Originally Posted by Fordified
For your HP goals, any of the motors listed would work. It really depends on how you like to drive your car? Do you like a high winding motor or do you like alot of torque? What does the car weigh? What gear and tranny will you be using?
Cranks, rods and pistons will all cost the same no matter what motor you get. The 350 block is by far the most common, and better suited than the 400 for street driving.
Well I just picked up a complete 350 out of an 84 suburban for $200. I looked up the block ID numbers and it is a 4 bolt main

. So im definitly going with a 350 block. Now to answer your questions fortified.
First off the car is not going to be driven daily. I love torque, but I also would like to turn some more rpm's so the turbo can do its job. Im not to sure what mustang coupes weigh, but im going to say that it will be around 2600 with the sbc motor and some weight reduction

( custom tubular K-member, fiberglass hood, rear seat delete kit, and fiberglass trunck lid). I will be running a built TH400 tranny with a 355 gear. LMK what you guys think. Thanks