bigmo-
Listen to what Chris has to say.
If you're talking about a Tbird that has a naturally aspirated V6, there are a number of differences between the motors, such as crank, rods, pistons, EEC-then you throw in the design of the radiator/intercooler-by the time you finish gathering all of the parts, you may as well have bought an entire car.
Same with using an Eaton M90 for a V8-with the rear intake M90 you'll have to fabricate a manifold-that will eat some available cash.
I wanted to put a huffer on my V8-but the cold hard reality is that you're better off buying an SC with some minor issues and repairing those-at least then you have all of the nice amenities to go along with the power.