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.
2004 Nissan Titan, My DD
1966 Buick Skylark GS with 455/TH400 fully restored, my first car, had since 15
1965 Chevy II Nova Drag car project with 454/TH400
1955 Chevy 2DR Wagon project. Hopefully will be Chevy Vortec 6.0L/Tremac 5 Speed
1948 Willys CJ2A Jeep My current project 4.8L Chevy Vortec LR4, SM 465, Dana 18, Dana 30/Dana44, 34" Swampers with 4.5" RE Lift.