Id pull this jalopy into the garage. Id pop the hood and take a look around. Then id head straight to the dealer and order a bunch of new parts. Id order the turbo, a new hp manifold, a new muffler and cat convertor. New pipes. And a high flow air filter.
Go home and start taking it apart making room for the upgrades.
Once the parts came in, id install the new stuff. The turbo, and make it true dual exhaust. Wouldnt be that hard or complicated. The new manifold would be the worst of it. Once the turbo, manifold and exhaust is set up id put the new airbox on. Easy squeezy. Close the hood. Fire it up. Take it down the street, and the first red light i get to, id rev it up so the guy next to me hears it. Light turns green, i punch it, and blow that mother off the line.
Point is, im not talking bout a rebuild here. I am talking about some serious performance upgrades. Expensive? Yes. Time consuming? Yeah, maybe a month or two of work. Difficultity level? Eh, anyone with a socket set from Sears could do it.
Just get this thing tearing it up. No big deal. Just drop the old parts off at the junkyard.