I tried installing my MP valve covers tonight. I can barely get the bolts started as the covers+gaskets are too thick. I'm using the felpro rubber gaskets and ARP bolts. Has anyone else encountered this problem, and are there thinner gaskets that would help?

1967 Dodge Dart GT 3.23 sure grip 8.75/727/360 .020 over w/edelbrock heads 2000 Dodge Ram 2500 Quad Cab CTD