Twin turbo build help..

[rons69camaro]

I'm currently in the middle of a twin turbo build/swap from a 383 on my '69 Camaro and looking for some advice/suggestions. I'll start with what I have for the swap.. A completely stock LS1 out of a '99 Camaro and a T56 out of an M12 '04 GTO. I made the same mistake as most and wasn't originally planning on going with a boost set up and also bought a set of TFS 220 heads that were milled to produce 11:1 compression with Mahle pistons and factory head gaskets.

My goal is to get to around 650 hp. What I'm trying to figure out: Should I sell off the heads for lower compression, do I need to do anything to the bottom end of the LS1, what turbos would be ideal/recommended, and what's recommended for the rest of the conversion (ie fuel set up tank pump injectors, transmission parts, wastegates, blow off valves, should I upgrade my intake and throttle body, etc.?