So the best block to build a 408 is the F4TE roller block produced from 94 to 96. This of course excludes the high price race blocks. I really want to build one of these blocks because the interchangeability between this and my 342, and because they are rare. I cant seem to find them anywhere till I called a machine shop locally, and they had one. It is a short block from the 351 Heavy Duty Motorsport crate engine. They want $900 and its totally rebuildable and still standard everything. I can always sell off the rotating to help pay for the rest or keep it. These crate blocks have their own casting and feature more nickel and stronger webbing. Should I do it. The only other choice is the guy on ebay who has them rebuilt, 40 over with free shipping for $1100. Still I have to gut the thing since I am going to be building a 408. Anybody know the internal specs of the Heavy Duty engine. Oh yeah, it comes with a roller cam and lifters and junk. I'm really tempted but I was suppose to buy an intercooler on the 1st. Maybe I can swing them both. HAHAHAHA, I'm so greedy, I want more. MY goal is to have my 342, this roller 408, and my 460 all ready to drop into a Fox body. Imagine all that choice and Ford fun.