What engine setup (blown small or aluminum big)

Turbo'd V8's are a blast to drive, but it's hard to be consistent at the track. Well, atleast that was my personal experience. If you have any fabrication skills you can build a turbo system for WAY less than what you're looking at, as Dustin said. It's not hard, but can be a little tedious when figuring out where you want to route your piping. BUT, if you are willing to put in the time it would be well worth it. However, you can make 500hp fairly easily with a 408 stroker, and not have to worry about tuning for boost.