Technical can you help me ID my 33

I just picked up a 33 Plymouth coupe, was turned into a dirt track car many years ago. Stock frame. It has an I-beam type front axle, not sure if it is the original because I thought they where tubular for this year. The front springs, attachments and axle mounting pads seem to line up though, so maybe it is stock?
The rear end is definitely not stock, it has a GM cast into it, along with some other numbers, hopefully the pics show it. Front wheels have 5 on 5 bolt pattern and rear end has 4.5 on 5. By looking at the crossmembers and mounts, the car must have had a SBC and a powerglide installed. Can you ID what I might have here? Thanks for your time - Mike

 

I don't recognise the axle. May be mopar but I'm doubting it. The only vehicle I can think of with a beam axle and 5on5 bp is Studebaker pickups.

Show us some pics of the whole car!

 

That rearend sure does look like it's got a great big GM cast into it, are you sure it's 4.5" bolt circle? Remember, you can't measure center to center on the lugs, it's center of one lug hole to the outside of another, across. I'm not aware of GM ever having used 4.5" bolt circle on anything although it's possible.

If the front is actually 5.5" it could be from an F-1 truck or something similar, they had parallel leafs.

 

A tag on a rear end usually meant something special......maybe ?

 

That is a Chevy rear. The date code is F217, Feb 21st 1957. The tag should tell you what gears are in it. It has a 5 x 4 3/4" wheel (chevy)

 

So, then I didn't measure the bolt pattern correctly, I went center to center. I will have to get back out there and do a better job...For the front setup, could it be that the mopar cars and light trucks of that era have different axles (spindles, etc) that basically match up to the same mounting points, with the truck being a heavier duty option for a guy building a dirt racecar?

 

Thank you, that really helps a lot!

 

Thank you. Your car is outstanding- I am putting a couple of pics here that show what I'm starting with. Stage 1 is to restore it as a replica of my dad's old race car from the 50's, as a surprise to him so we can go to the vintage track shows around here. When he's done with it, stage two will be to put it on the road with some upgrades, keeping the vintage racer look.

 

Too tight on the bends to be a MoPar axle.

 

Those wheels look like F-1 or F-100 wheels from the early 50's to me, that's what I would guess the axle is from, but a clean comparison of the backing plates/spindle mounting pattern would help tell the tale.

 

I think the front axle may be F100 from 61-64. Or maybe Econoline from the same vintage.
If so there should be a raised number on the vertical web near one end.

 

Thanks, I will check for that...you guys are really saving me here.