Y block head gaskets
I am getting ready to install the heads on my 292 rebuild project. The block was decked .020" and the pistons are still anywhere from .015-.020" down the hole. I realize this isn't ideal, but that's what I've got. I will be using the medium comression "C" heads that will be milled about .020" to clean up warpage and rust. With a steel gasket (.018" compressed), compression would be in the 9-9.5:1 range. Engine will be using rams horn exhaust manifolds for dual exhaust and an Edelbrock 500 carb.
I have a gasket set manufactured by Best Gasket, which contains a fiberglass (?) head gasket set. Uncompressed thickness is .057". I don't know the compressed thickness of this gasket. There are a couple of steel shim gaskets sets on Ebay right now, and I wondered if they would be a good choice for my set up (they are not manufactured anymore). The reason I am asking is that I wonder about how quench affects an engine's ability to resist detonation. I understand the quench theory, but wonder when increased compression (a little higfher with the steel gasket) begins to offset the quenching effect. I had detonation trouble before the rebuild, and was trying to increase my quench by decking the block.
Also-what about the long term reliability of the steel gaskets? Do they need re-torquing? Copper coat on both sides before installing?