Not sure what bits a boxster will help with other than brakes.

The 1.8t 20v engine fit quite easily so you have 150bhp,to 225 bhp standard and easily 250 plus then 350 and up if you want to get stuck in. If it is nice to drive and super original it will be worth more standard to some but is never going to be a fast track car without work....they handle very well though.