That ford you had that was a Lemon did it have one of the 6.0's Known as the SICKO or did it have the 6.7 I here they are not any better than the SICKO The Truck I would love to put together would be as follows Ford Crewcab, Allison automatic. and a Cat engine Now that would be One Sexy Truck LOL!!! Some years ago when My Dad, My older brother and I had our trucking Company we put the trucks together starting with what is known as a Glider Kit. Cab, Instruments, main cab wiring harness's and a Frame drilled for our specified trans, engine mounting, and differentials. The first two Pete cab overs were purchased complete with Cat engines, All the others we assembled had Cat Engines built by myself with the help of a cat truck engine man.
Most Diesel Engines these days will last longer than the chassis. In the 8, almost 9 years I drove Trucks I accumulated just over 2 millions miles. Every State in the Union, Mexico, All Provinces of Canada, The Northwest Territory's, Even jumped the truck on the Ferry's out to Vancouver Island , delivering Saw Mill Equipment. Also parts of a Huge Mining drag line to Faro Yukon Territory I'VE BEEN EVERYWHERE MAN LOL!!!!