On a Stock Super Beetle - Ball joint, strut front end, IRS. The more I think about it, the more I realize how much it's necessary, as you said evilC. I'm only 19, and I have no welding skills, etc. to do the work myself. I live in Ohio, and there really aren't any reputable VW facilities around here to help me stiffen the chassis, that's why I just wanted an engine w/ as much HP as a stock chassis/frame could handle, and I wouldn't have to mess w/ the frame/chassis. BTW, I'm looking at a CB Performance Hideaway Turbo:
http://cbperformance.com/turbostreetengine.asp