A true top swap includes the heads as well. This will be where a good portion of the power increase will come from on this swap. There's a pretty good list of what you'll need in the link below. Not sure if that's everything, but should be most of it. That's the best site for 60° V6 questions/info. This top end swap has been done many times by people on that site, so you can find out quite a bit digging around on there.Originally Posted by 96gp
3100 Topend Swap, parts search and questions
....I don't know about "plenty". There weren't exactly plenty of those cars made to begin with ('89 and '90, BTW, + 1000 4-door STEs made with the same turbo set up in '90 only), and who knows how many are left that haven't been sent to the crusher already by now. Also, the exhaust manifold ports from the TGP won't line up with a 31/400. It would be a lot of trouble to go through for a tiny ass Garrett T-25 set up. You'd be much better off powerwise creating your own custom turbo set-up.
