[b-man]

1.65 rockers will put stress on the studs, perhaps enough to cause them to snap off at the bottleneck.

Personally I wouldn’t do it unless I had BBC style 7/16” screw in studs.

This was recommended in Pete McCarthy’s book, so when I ran some good used RAIV 1.65 stamped rockers with the 068 cam I converted the heads to screw-in ARP 7/16” studs.

I don’t like pulling off one of the valve covers somewhere out on the highway to see where that nasty noise is coming from…..