The 1963 Oldsmobile Parts manual lists 1961-1963 F-85 head gaskets at 0.020″ thick for all 215 cid engine applications. These gaskets are all steel, #578813.
The automatic transmission Jetfire’s are 10.25:1, and the manual transmission Jetfire’s are 10.75:1.
If you had 0.020″ milled off the head to clean up the surface, the FelPro 0.040″ should give you the correct compression ratio?
