I don’t think they make poly locks as short as 3/4”?
Anyway, you have to play around with both the stud height and the poly lock height. IIRC, the magic number is a minimum of five turns in on the set screw.
ARP has a bunch of different heights of each, all listed on their website. I ended up with ARP 300-8246 locks and ARP 334-7202 studs.
And if you really want to get neurotic about it you can try to find the right stud height, lock height, and also just the right thread length so that the rocker is only riding on solid metal and not the threads at all. Probably not going to matter with the strength of ARP hardware, but apparently rocker studs do snap sometimes.
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1976 Trans Am Buccaneer Red
468ci, 10.5:1 CR, 87 CC RPM CNC e-heads, HR 282/288, 230/236, 561/.573 lift, Johnson Lifters & HS 1.65 Rockers
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