HWYSTR455 - Zero lash + ½ turn of preload. I followed SD Performance instructions, which was straight forward and easy. Following the firing order with each valve on the heal of the cam. He has an easy process. The poly lock tightening was per Harland-Sharp instructions. Also, straight forward.
Edit - New valves. Ferrea. The machinist completely redid the heads, and all components therein. I only installed the rockers, pushrods, and R&Red the checking springs on the #1 cylinder after sorting out the push rods.
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1965 Pontiac GTO
455/469 w/ #48 Heads, '65 Tri-Power
9.25:1 CR
Stump Puller Cam
Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00
3.55 Rear Differential
Front: 225/60R15 Height: 25.6"
Rear: 275/60R15 Height: 28"
Last edited by wbnapier; 09-08-2020 at 10:33 AM.
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