Cylinder head discussion 340 with stock above deck pistons

I have a 340 block with approximately 10.25:1 compression bored .040 over, j heads with 72 cc chambers, comp cam xe268h, air gap intake, holley 780, Doug's headers, and a 100 shot of nitrous. 3.55 and a close ratio 4speed. It ran 13.1 last season with the spray. I'm wanting to get a bit more out of it on the track and am thinking about upgrading to aluminum heads. I've seen discussion about how aluminum heads can lower compression by 1 point due to heat dissipation. Is this true? And would the 65 cc head make up for this difference and get me back to where I was? I've been looking at the eddys for the 340 pop top pistons because that already how my motor is set. The shocker 185 wirh 65 cc look good aswell. I know I've seen a few other threads with similar convos but some of them are fairly old and don't address my exact concern. Wouldn't the aluminum head also help me fight detonation against the nos with the better disapation of heat? What heads would you consider to be best to get me down into the 12's?