I ordered a set of FelPro intake gaskets for my 312,. I specified for a 63/64 truck so I would get the smaller exhaust heat passage I received the gaskets and they have the full size 1" square heat passage. The part number is MS 9361 B1, and it has 45196 in a little box too. The application says that they are for 55-64 car and truck, 272" -312". They may have changed their offerings to one set for all applications. I found I had some extra gasket sets and have a set with the small holes, all metal. Are the valley pan/push rod chamber cover grommet type washers the same as those for the valve covers?
Thanks,
Paul J. - '57 E Code