Thoughts on Combo?

[1989GT]

I would say look into a different set of heads. I love the P's but for forced induction there's a lot of better choices out there. The P's work well for NA set ups but some of the better flowing heads will yield better results for the blower route. But if you got the heads cheap and plan on sticking with them that's fine too. But they'll raise your compressioni ratio a bit...probably not enough to matter though. I'd say a 75-80mm MAF and a 70-75mm tb should do just fine. There's a lot of good cams out there for blower setups. Your best bet would be to figure out what the heads flow after they are ported and what not then choose a cam based on that and the psi you plan to run.
-Ryan