To be brutally honest, if you don't have any fabrication skills (or probably the equipment either) then keep it simple and stay away from a blower. They aren't worth the cost or the wear on the motor. It takes tuning, nothing is really a "bolt on" and there is a bit of constant maintenance required. I have friends that have had 6-71 blowers on cars and were glad to get away from them. Look neat but not really worth the hassles in the real world. By time you upgrade the fuel system, cooling system, pistons and cam change, really good ignition, all new plumbing (read that as expensive) as stated above, you would be lucky to keep it in the $2-5000 range. Sounds like you would have to hire most of this work done by others.

JMO,
SPark