Thanks for the suggestions. It's only doing it on the drivers side. I took the cover off the other day, put the PCV baffle in a vise, squeezed it together a little and thought that had fixed it, but the tap came back. It sounds like one rocker is hitting. Maybe I just need to let it hit long enough to make a mark on the cover...

I don't have room for taller covers, they will hit the fire wall (stock 1956 3100 fire wall).

Thanks again, I'll let you know what I find.

Mike B smile

Mike Boteler

1956 Chevy 3100 Resto Rod
1952 Willys M38 Army Jeep
1983 Jeep CJ7 Laredo
1984 Jeep CJ7
+++++
Silver Spring, MD