build a cobra engine for boost set up??

[03stangGT]

I'm considering buying and engine to play with... here is the idea. My buddy who does the work on my car (as well as his 11 sec cobra) has a friend with a 1996 cobra motor he is selling. he can get me the complete motor for $1k the motor has 70k miles and runs mint! Would it be a waste of time for me to pick up that motor, install manley forged rods/pistons, and bearing kit, with low comp pistons? I'd like to build the motor for a blower or turbo application. This would all be going in a 2003 GT. I would like to keep my GT motor stock and keep it as a back up. I wanted to build a 4v because of a few things... I like a motor that rev's! and the cobra motor does compaired to my GT. Also it seems as though you get more HP from boost as compaired to a GT. Soo would this be a total waste of my time? Is there a better way to do this? keep in mind I'm not going to touch my GT motor, and I want to build a 4v, and not spend $5k. ANY opinions would be great....thanks in advance!

ps...the stock crank in the cobras are forged arent they? wouldnt wanna have to spend another $1k on that