Dave made some excellent points about a 5.0 litre engine, you can get the same horses for less gas money, and have a programable engine, that is much more versatile amnd works in a much more modern era. Rebuilding the engine shouldn't be much different, just the fuel injection and computerized parts at the end. A 5.0 ltr. or 302 will fit a lot easier into many different engine bays, and be much lighter, freeing the need for more horsepower to move a heavier engine. Heck a chevy z series engine works great too, and is probably even cheaper to play with! And find info on!