I'm doing exactly what you said your plans are. Check out my threads.
Here's where I go through a full restoration of a fairly nice 1986 3.2 Carrera. I added GT-Racing flares, then pulled them off when I got bad advice from the body shop. I then welded on steel panels from here - back when they sold them.
http://forums.pelicanparts.com/paint-bodywork-discussion-forum/502929-diy-iroc-rsr-conversion.html
This thread, I'm doing the full LS swap from Renegade. I've purchased every single piece that Renegade sells including their AC system. I'm not done with it, but it'll give you an idea.
http://forums.pelicanparts.com/porsche-911-technical-forum/649179-rsr-ls-conversion.html
Hal