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Projects 1929 Coupster Build

Discussion in 'Traditional Hot Rods' started by Bad Attitude, Jul 4, 2025.

  1. Bad Attitude
    Joined: Aug 19, 2023
    Posts: 9

    Bad Attitude

    Purists beware: hacking ahead!

    Hello all, starting this thread to document my Sport Coupe progress I have made over the last couple months. I am a VW guy through and through but my late friend had a very clean 31 Pre War Roadster that gave me the itch. After his passing the car fell into the wrong hands, unfortunately. That said, he will serve as an inspiration for this build. My main goal was a cool little semi “period” roadster for less than $5000. Two years back I found a pretty clean 30-31 frame for $300. IMG_4925.jpeg At the time, my mom had a strict rule that I couldn’t have any more project cars so I told her I was off to get some to get some “car parts” :D which wasn’t completely untrue. I just didn’t clue her in to the fact that these parts would become a car lol. Initially, I grabbed a cheap 27’ Touring basically on a whim hoping I could use its drivetrain. Never buy first and research later! While it was cool, it was rustier than hell and obviously not what I needed.
    IMG_4945.jpeg
    With that gone, I began the search and found a pretty decent 29’ Sport Coupe for $2000 that had been sitting since the 70s. IMG_6913.jpeg
    Upon closer inspection, the motor was likely seized, however it still had plenty of parts and a good body to use. Which was my main concern. Once home it was time to start pulling parts to transfer to the 30’ frame. Oh and along the way it seems my cutoff wheel had gotten busy. I know many of you will say I hacked a perfectly good sport coupe body..and I did. But I am big advocate of building the car you want if you cant afford to buy it. And right now, Roadsters are just too damn spendy. IMG_9299.jpeg
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    For now I just opted to use a el-cheapo ebay aluminum radiator. That is one thing on the list to replace but it works for now. I also stumbled on a good running engine and trans for $500. Grabbed that up and stabbed her in. Amazon cherry-picker for the win!
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    next I rolled the frame back over to the other garage to swap the coupster body onto. Believe me when i say the sawhorse and stack of wood combo was sketchy at best, but it got the job done.
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    now to roll it back over to the other shop where the tools are. I moved on to small things like painting the shroud, wheels, etc. IMG_9778.jpeg
    And as it sits today:
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    It looks damn good at first glance. Just Don’t look too close at the tires, or headlights or everything else lol….I will take more progress pics as I go. But for two months of actual hands on work I was pleased with it. As it stands, she runs and drives but there is a grocery list of item left to do. Things like exhaust, breaks, interior, paint, blah blah blah. The list goes on :) I will do my best to update as I go. Oh and my friends Roadster as inspiration :)
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    Attached Files:

    Last edited: Oct 12, 2025 at 7:24 PM
  2. Tim
    Joined: Mar 2, 2001
    Posts: 19,907

    Tim
    Member
    from KCMO

  3. Deutscher
    Joined: Nov 12, 2024
    Posts: 188

    Deutscher
    Member
    from Germany

    Yes, cool.
    Greetings
     
  4. rustydusty
    Joined: Apr 19, 2010
    Posts: 2,494

    rustydusty
    Member

    Nothing wrong with a “coupster”! I would probably do the same. Nice job turning it into a running and driving car. Tell me about the boat with the 6 cylinder Mercury outboard in the shop ( there’s a thread in the “antiquated” forum for vintage boats)…
     
  5. Bad Attitude
    Joined: Aug 19, 2023
    Posts: 9

    Bad Attitude

    Yeah its a 58’ Glasspar. My Father bought it from the original owner who used it in 58, 59, and 60. It has basically been sitting since. Original interior and everything else. Same guy who I bought that Model T from rebuilt the 6cyl for us. As long as I have been alive its never been in the water, so atleast 23 years :) I am hoping this summer or next he can get it out to enjoy it and then we’ll probably list it
     
    chryslerfan55 likes this.
  6. Bad Attitude
    Joined: Aug 19, 2023
    Posts: 9

    Bad Attitude

    Not a lot done, a lazy weekend for sure. This morning I had to extend the radiator brace rods a few inches. I ordered these from Mikes, not SUPER happy with the quality as they were chipped and had some rust but then again so does most the car :)

    You can see it was quite a bit short, probably because of the different rad. Opted to splice it in towards the rear, hopefully it wont draw the eye as much.
    IMG_9927.jpeg IMG_9929.jpeg
    Got the donor piece (cut from a VW seat adjuster handle lol). Just adding a 1.5” section, mocked up into a little angle iron jig for tubing/rod
    IMG_9930.jpeg IMG_9931.jpeg IMG_9932.jpeg
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    The first welds pulled it to one side slightly, so certainly not perfect but it will be hard to tell when installed. Finish weld it, clean up a bit and repeat for the other side!
    IMG_9937.jpeg
     
  7. Bad Attitude
    Joined: Aug 19, 2023
    Posts: 9

    Bad Attitude

    Next I had to do the paint. Sure it definitely needs a head gasket but cosmetic stuff is obviously more important :) grabbed some of this oil based rustoleum from Ace on a whim and brushed it on. Trying to do this how a young hotrodder may have done in the 40s/50s.
    IMG_9915.jpeg
    30 minutes later and very happy with how it turned out! IMG_9919.jpeg
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    Found these stanchions for a very reasonable price and begun to get them mocked up. Anyone know the year/model? They look like typical 28/29 roadster posts but the lack of nipple at the top for the convertible top is throwing me off? Cant really find anything similar online.
    IMG_9940.jpeg IMG_9939.jpeg IMG_9938.jpeg
    It’s slowly getting there. The doors and windshield seem to be the most distracting part with Coupsters so trying to handle that as best as possible.
     
    Last edited: Jul 6, 2025
  8. dmar836
    Joined: Oct 23, 2018
    Posts: 394

    dmar836
    Member

    Any updates?
    D
     
    chryslerfan55 likes this.
  9. Needs a banger.
     
  10. dmar836
    Joined: Oct 23, 2018
    Posts: 394

    dmar836
    Member

  11. Grumpy ole A
    Joined: Jun 22, 2023
    Posts: 271

    Grumpy ole A
    Member

    Like to see pictures of how you are going to do the top of the door and the dash. My hot rod, aviator, is a 30 coupster. I didn’t build it, I bought it this way.
     
    Outback likes this.
  12. That is pretty decent. How did you finish the door tops? That is usually a challenge.
     
    Outback likes this.
  13. Bad Attitude
    Joined: Aug 19, 2023
    Posts: 9

    Bad Attitude

    Finally back in town to where i can put some work in on the Coupe. I Started on the passenger door and pillar. Removed the inner structure and narrowed the profile a bit.
    IMG_0871.jpg
    IMG_0873.jpg
    Then added what will be the top panel. With some square stock for structure.
    IMG_0875.jpg
    IMG_0870.jpg
    It's not quite as narrow as i would like, still resembles a shelf imo but it's a lot better for now. Gonna pause on the door for now until I get the latches in the mail. Once those come in I can finish up the inner structure and B pillar.
    Next is the A Pillar situation.
    IMG_0885.jpg
    IMG_0887.jpg
    Hacked up a bunch of the old pillar corner and got some steel in there to start mocking up how the stanchion will mount up.
    IMG_0888.jpg
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    My big goal was getting the profile correct. Used some scrap steel to start modeling what 28-29 roadsters have.
    IMG_0891.jpg
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    Once it was all welded up, i made sure it actually fit in the stanchion and the holes lined up.
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    Holes drilled and some nuts welded to the back.
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    Mount tacked in place
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    Stanchion mocked up, pleased with how it sits.
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    All welded in place. Just the finishing work left to do, filling gaps, and grinding smooth. Repeat.
    IMG_0902.jpg
    Excuse the messy shop. Misted the door to see how it may turn out and bolted up the stanchion. Now the tricky parts comes, making the left look like the right ;)
    IMG_0907.jpg
     

    Attached Files:

  14. Bad Attitude
    Joined: Aug 19, 2023
    Posts: 9

    Bad Attitude

    More of the same today...measured and cut driver a pillar
    IMG_0918.jpg
    Trying to do this side a little cleaner.
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    Testing fitment...not bad
    IMG_0920.jpg
    Clean up the edges and tacked in the new "footer"
    IMG_0921.jpg
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    Next just profiled the inside of the stanchion for the mount and cut out the origami pieces. Had to fix a little booboo.
    IMG_0923.jpg
    first check went ok..
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    Fully welded, still some cleaning to do
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    Drilled the holes and welded up nuts on the backside. Stanchion fitment to the body was decent so tacked everything in its final place.
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    Finished product! Two Roadster-like windshield posts. And they are about as square as I will ever be able to make them. Eventually, we'll make an actual windshield frame, maybe next weekend :cool:
    IMG_0938.jpg
     
    High test 63 and oliver westlund like this.
  15. Bad Attitude
    Joined: Aug 19, 2023
    Posts: 9

    Bad Attitude

    Jumped back in bright and early this morning. Started on the drivers door. You’ll have to bare with me, still getting used to taking pics throughout the day.
    IMG_0945.jpeg
    Found my groove with this side, which means I will have to redo the passenger side. Ending up using the original top section I cut off the door to match the curve. New door top is 1.5” (roadster door width) vs the passenger side 1 3/4”. Much happier with how this one looks.
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    This is about when i dodged disaster. Cutting the inside of the door structure, my diamond cutoff wheel kicked back and knicked just below my middle knuckle! I will spare you the gore but it sure is gnarly. Safe to safe full PPE will be utilized going forward :D
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    got the driver top tacked in, will finish off the rest tomorrow. Need to pull the door off to get the rest done, or build a bigger shop haha.
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    On the way to get liquid bandage for my hand i found myself at the hardware store. Next thing I knew 10’ of conduit followed me home :eek: Cut the top section at ~43” and began notching the left and right sides.
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    left and right sides tacked in.
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    i failed to take many pictures but the rest of the work was essentially me slicing small lines in the lower section and then staring at it until the curve looked decent
    IMG_0965.jpeg
    still bouncing around some ideas on how I’ll get the piece of custom glass in there…but in the interest of budget it may end up being plexiglass…we’ll see. But that should bring you guys up to date.
     
    oliver westlund likes this.
  16. oliver westlund
    Joined: Dec 19, 2018
    Posts: 2,795

    oliver westlund
    Member

    Dont forget to make the top or bottom of your frame removable to get the glass inside! I used L shaped bits, welded inside the top, drilled and tapped and a small screw through each of the verticals. Neat build!
     
  17. Flipper
    Joined: May 10, 2003
    Posts: 3,439

    Flipper
    Member
    from Kentucky

    Yeah, I used to hate wearing gloves too. A couple of weeks ago, I tore some hide off of my fingers with one of those abrasive paint stripping discs on a 4.5" grinder. I'm gonna learn to love gloves.

    The car looks fun!
     
  18. High test 63
    Joined: May 8, 2020
    Posts: 551

    High test 63
    Member

    Great job on the doors and windshield post! It really looks good.
     
  19. Bad Attitude
    Joined: Aug 19, 2023
    Posts: 9

    Bad Attitude

    yes! I think I will end up doing some similar. Essentially sleeve the verticals and add a set screw or something.
    Not a lot done today. Just fixed the passenger door. Still debating on how i want the structure to look.
    Before:
    IMG_0982.jpeg
    Carefully cut the tack welds and flattened some of them out.
    IMG_0983.jpeg
    New piece prepped, use the same method as the other side to template the curve.
    IMG_0984.jpeg
    All clamped in place
    IMG_0985.jpeg
    And tacked in, WAY happier with this than the previous two piece disaster
    IMG_0987.jpeg
    Was feeling demotivated so I rolled her out to get some fresh air and a new perspective. The windshield shrunk a bit during the final welding, so it will need some further adjustment to mimic the firewall curve a bit better. Really liking how its is coming along, but the work isnt done yet! Once the government decides to provide me with a paycheck we’ll get back to work on the engine. Stay tuned.
    336A5469-1007-48C2-AF67-81F3796BA7B9.jpeg
     
    Last edited: Oct 12, 2025 at 7:15 PM

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