How much does it cost?

Assuming you're gonna keep most of the car stock, and as you said, do the work yourself, figure the price of the Hemi (mild, say 15-18k for a used, good motor) about 1k for an exhaust system (unless you're building one), 300 for frame connectors & engine plate material, 1k for a cooling system and that should give you a ball-park figure. Keep in mind I don't know if you want to cage the car, move springs in or what type of tranny you want to use or how stout your rear-end is, but I yhink you get the picture. It ain't cheap, it IS easy to do but I'd have a plan first as to what I want the completed car to be....