My background in hot rod and custom shops might give me an unfair advantage. My buddy and I built a Model A pickup. The custom shop we were working for was moving, so we sold a bunch of parts, but not before Kraft (me) and SpaGetty (Spencer Getty) built a wicked little abomination.
The only thing we bought was the cab.
Frame: 58 Belvedere. It was a frame that we had replaced because it was rotted in the middle. Since we were shortening it, we were able to cut out the rot and stitch it back together.
Engine: leftover random smogger 350
Trans: one of the rarest iterations of a TH350 ever... a dual (chevy/BOP) bolt pattern TH350. I have only ever seen 2 in my life, and the internet is so skeptical that they think it doesn't exist.
Rear: Ford 8" from a Mustang 2
Steering box: 61 Olds
Steering column: late 50s Caddy sedan. It was way too long and it put the steering wheel about 4" from your nose.
Seats: Greyhound bus. They were that gray upholstery with the red and orange squares in it.
Front suspension: completely fabricated with some schedule 40 2" pipe and a very unhappy tubing bender and half a tank of acetylene. Welded on some trailer spindles and stole some 1-3/8" hubs off a boat trailer with a 5x4.5 pattern. Wheels were Mustang steelies.
Rear suspension. It sorta had one. More 2" schedule 40 pipe made some truck arms which were welded and gusseted to the axle. The springs were homemade redneck coil overs.... air assist shocks with those truck helper springs that clamp on the outside. It was frighteningly under sprung.
The master cylinder was something from the junk pile that we honed out and got working. We guessed 50s Pontiac. We knew it was the early GM single master, and it had an arrowhead on the cap. It was so inadequate that we ended up hooking it just to the front and moved the pushrod up on the brake pedal. As long as it wasn't wet, gravel, or anything other than stopping like a grandmother, you were fine. Panic braking just locked them up and sent you screaming into a near-death situation.
Radiator: We never figured out what it was. It was a downflow brass/copper thing that we thought was an early Mustang, but it was smaller. It was also grossly under sized. We could go about 10 miles before it boiled over.
Gas tank was a 5 gallon boat gas tank sitting in the bed. The bed was completely fabricated by SpaGetty.
There might be 10 more manufacturers in there. At one point we were so desperate for steel to fab brackets that we found random cutoffs in corners that might have been from notching the frame of a Lada for an LS dragster we did, or a piece of a sway bar from a Fargo pickup we customized.
He took it home and put it on ebay and we got $14k for it. Never would have made $14k selling all those individual parts. I just emailed him and asked for a picture.
So, that car had GM, Mopar, Ford, whatever the radiator was (probably a tractor), seats from MCI, gas tank from OMC, and maybe Lada and Fargo (which is technically Mopar)