Technical 39 Pontiac steering upright cross reference?

Now that Fatman fab is defunct, I am seriously considering modifying my own set of dropped uprights for my 1939 Pontiac. The plan would be to purchase a set, as not to risk my set installed on the car, and modify those.
I do see listings for them on line with a WIDE range of prices, but they also have various applications listed. Pontiac, Cadillac, Lasalle, Olds, etc. Some list part numbers embossed on them, but mine have no number.
Is there a reference somewhere to say what applications these uprights were used on?
I want to ensure I get a correct match. Photo of one for sale ( not mine) for reference.

 

You could check a Hollander manual. For a cross reference.

 

Hmmm..not really familiar with that. I’ll do some homework. I assume they are by model year?

 

Awesome. This is exactly what I needed! Thanks!

 

I am going to be following this as I am in the same predicament other than my interchange number is 139. Apparently, Tim was not able to sell the upright patterns.

 

Hey Bangin’. FYI- I do see stock 40 Buick uprights on EBay.

 

So does this logic hold up? :If I have a set of stock upright supports, a machinist buddy and a certified welder?
I have the machinist creat a jig to hold the uncut support perfectly. We cut the king pin barrel and slide it upwards 2-1/2” using the jig to keep it aligned for the welding process. Looking at an installed support, there appears to be no significant interference concerns, so adding any additional stiffeners or gussets would be possible as an additional safety margin.
I mean really, what could possibly go wrong?

I have in my past life designed tooling for aircraft repairs, so it definitely seems do-able. Thinking I may even fab up a rough prototype myself.

 

I don't think you really need to build a jig. If you "stack" your aquired king pin barrel on top of the existing barrel and use a king pin to align, you have already created your jig. If you want more drop than that, have your machinist friend fabricate a spacer, to increase the drop. I had already thought this process through for my Cadillac. The most important part is the certified weld and added gussets. Another added step would be to have them NDE tested when you are done. 60 Special

 

The plan I had in mind is similar, using a king pin or round stock of the same diameter. Just want it secured to ensure the precise location.

Oddly enough, I also have a friend that is an NDI technician. I’ll hit him up to understand what process we would need for forged steel. Somewhere between the welder and the NDI tech, is the answer.

 

i have 3 NOS for a 50's Olds, will try to get pics and part #s today

 

@AGELE55, I did see the Buick uprights on the Bay. I have a spare set, but thanks. I am still bouncing around the idea of converting to ball joints for at least one of my cars. The dropped upright does get you 2 to 2-1/2" of drop but does not do anything for the caster angle. Keep in mind you also have to bend the steering arm down the equal amount of drop to avoid bump-steer.

 

Can you flip them upside down?

 

New uprights are available from www.suspension.com. Part # rareparts 15626 and rareparts 15627. Pricey though.

I did buy one off of the Bay. Moog 547, Not sure which side yet. I don't have an old Moog catalogue. Mark probably does, as he has everything.

 

here's mine, the straight one might work.

 

Negative

 

Wow… looks like Fatman parts may soon be available once again.

 

^^^^ spoke with sales at Southern Rods today. The uprights will be offered in the future, as they did buy the patterns and drawings.

 

Uprights for my Pontiac & your Buicks?

 

^^^^ according to who I talked with, all of the uprights that FatMan listed will be offered by them at some point. I believe the ones FatMan offered were BOP for the applicable year and series.

 

The straight one crosses to a 37-38 Olds and some Caddies.

 

thanks for that info

 

Update- Southern Rods did not buy all of the intellectual property, only all of the chassis front end stuff. Two former employees that had been fabricating them bought all of the upright stuff. They can be found on Facebook at down right fab or 980-328-9993.