Another viable alternative would be to have your NPI heads ported - You can get NPIs to flow very well (much better than the stock PI heads), and that way you will maintain a more boost-friendly CR. Run your Comp cams in the ported NPI heads, and bolt up a PI intake. When you supercharge the car you will make some good numbers, similar to that of a 99+ GT running the same boost levels. Personally, I would be very wary of running boost on a 100K stock bottom end with a 10.5:1 CR. I know Steen Racing is a good company to look at should you decide that is the route you want to go. Either way, I would start saving for a built shortblock, but I definitely think the PI swapped/boosted setup will not last as long as the ported NPI/boost setup (assuming both have very good tunes)