Join Date: Oct 2003
Location: On the road in NE Oklahoma
Were the heads milled the thickness of the guide plates ?
I've used guide plates on two sets of HiPo heads without having to mill anything, and still had more room than what you have under the rocker arm. I was using Crane Gold Race rocker arms. But my Ferrea valves (1.94 / 1.60 ) were slightly longer than stock valves, so I used push rods that were slightly longer too. That moved everything away from the ARP studs.
PS. For those people adding screw in studs, but not using guide plates: Do your studs have flat bases, or do they have a raised circumference ? If they're not completely flat , like the stock HiPo studs, you are at risk of cracking the stud bosses unless they are relieved. The ARP studs are not completely flat, unless they've changed them recently.
Last edited by zray; 05-17-2018 at 01:48 AM.