I'm pretty sure someone has tried this setup before, but I was wondering if anyone else has the same problem I do?

I have very low compression in cylinder 2 and 3 (95 on both) but I haven't done a leak down test yet. I replaced my intake valves for itr and using my stock gsr on the exhust side. I also replaced pistons rings, had my head port/polish and changed out my retaniers for skunk2. Changed headgasket too. Now the car sounds like hell, with a rough idle, which kind of sounds like an airplane. What could be the problem?