This is my first post. Last week, I was lucky enough to work a trade on Craigs List for a 52 Plymouth coupe with 29,000 original miles and the most rust free body I've ever seen on a car of that age. It does need some love, interior, brakes, gas tank, etc, but it's all there except for the hubcaps. The plan is to get it to start, run, and stop reliably, then upgrade the transmission and/or rear end so that it can cruise on the highway.
First job is a 12V conversion, then the brakes. With my other old cars (mostly Chevys), I'd swap out the rear for more favorable gearing and better bendix brakes, and back the engine up with a T5. For the Pllymouth, I plan on using Scarebird's conversion to get discs on the front, but I'm not sure as to what I should do for the rear. I'm not sure because I found a company that makes disc conversions for '35 and up Chrysler cars, including my '52 Plymouth. It's at www.tsmmfg.com. If I can retain the original rear, convert it to discs, and swap in a T5 for the 3 speed, is there ANY reason I should NOT use the original rear? My understanding is that it's got a 3.9 ratio, which will work well with the OD on a T5. I have ZERO experience with Chrysler products from the 50s, so I don't know if there are any inherent weaknesses or drawbacks in the original rear end.
I hope not, because if I can get away with a brake swap on the original axle and use a T5 to make the car highway-worthy, it will save me a ton of work.
Thanks in advance for your input.