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…..
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1964 Tempest Coupe LS3/4L70E/3.42
1964 Le Mans Convertible 421 HO/TH350/2.56
2002 WS6 Convertible LS1/4L60E/3.23
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