I usede FelPro marine because I have the forst run and some gaskets overhung in the chambers.The cheap FelPros also fit with no overhang but with 12.5 pistons I opted for the better gaskets.Its been running for 3 months and no problesm even hitting 7K.Rocky
8519s, but I drilled the dowel holes 1/16 larger. The marine gasket would be a better choice as it has the better fire ring and a larger bore. Mine has been running about the same time 499 with 11.0 to 1.
The cheap Fels fit my heads perfectl.I had them and the 09s.The 09s had overhang.I just figured the Marines were a better grade even though my machinist said the Fels would work.They are a nice gasket.Rocky