Re: Will a 500CID Cadillac engine bolt up?
Sorry, my mistake about the TH425. You definitely will not have one of those. I was thinking that one of the previous posters was talking about the TH475 and mixed it up with 425 front driver. The TH475 is a heavy duty TH400 with straight cut planetary gears and heavy duty clutches along with heavy duty case and a few other goodies. It was used in some Caddys as well as motorhomes and other heavy duty applications. I doubted you would have had one of them as they are rare. Regular TH400s are plenty tough anyways. If you are mechanically inclined and have a good book you should be able to handle the swap of parts. You may be able to find a PDF of a manual online or some other directions. I have a couple good books but nothing digital. The Valvebody should swap fine. $950 is pretty pricey I would say. Do it yourself. It is not as tough as people make it out to be. Just be carefull and keep things clean as well as have a clean place to do it. Good luck with it.
1966 Buick Skylark GS with 455/TH400 fully restored, my first car, had since 15
1955 Chevy 2DR Wagon Gasser project. 496 BBC, Toploader, Straight Axle 60s Drag Beast.
1948 Willys CJ2A Jeep Project, 4.8L Chevy Vortec LR4, SM 465, Dana 18, Dana 30/Dana44, 34" Swampers with 4.5" RE Lift.