How come B engines and hemi's don't use it? I see your point but odd only on A engines have it. Wonder if it was a carry over from the poly motors and hemi's in the 50's.
It could be I don’t know. If the gasket kit came with it I used it. If not I didn’t go looking for one. This is the way I was taught. It’s worked for me for about 49 years of wrenching.
