View Full Version : putting a modern engine in a 70 Deville

11-23-09, 05:33 AM
I have a 1970 coupe Deville with a 472. The engine has seen better days and since it's not the original engine, I want to swap it out with a newer 454 or 500. Can any one give me a heads up as far as dealing with the computers on new engines and the electronics. Basically am I better of with a carb 454 or a EFI 454.


11-23-09, 09:53 AM
The 1970 472 is one of the best engines Cadillac made. I would look into a rebuild, but with mods for no lead, and low octane. Then, add aftermarket TBI fuel injection.

11-24-09, 03:09 PM
If you want a change, the 500 is good bet. Your 472 block is the same as used on the 500, so you can rebuild your engine as a 500. I'm not sure what you would need, but I know the 500 crankshaft is different, which gave the engine a longer stroke (I'm Pretty sure the cylinder bore was the same). If you rebuild it to 1970 specifications, then the 500 will make 400 horsepower.