Gen 3 hemi aluminum heads. About once a year I get a water leak and have to replace a head gasket. Motor never runs above 190 water temp. I've been using Fel Pro. I get the heads surfaced every time they come off to make sure they are flat. Compression ratio is 13.5:1. Should I use a thicker gasket than stock since I've had the heads surfaced more than once? Standard thickness is .027 but Cometic has many thicknesses available If you can find them.
