Crap…. I hit send/post….
There are options for head gaskets by Cometic (very expensive but….) that they will custom make in any thickness and bore size you spec. So… if n an example, you can tell them you have a 4.07 340, gasket size will be custom at 4.09 X .120 thick. That’ll drop your compression ratio.
Be ready for sticker shock! But it’s cheaper than a full rebuild.
This may not be the way to go though as some hi compression pistons will have the engine acting terrible with a lot of space that a thick head gasket produces.
Let’s wait and see what exact pistons you have in the engine and where they sit at. Also there health state.
