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I rebuilt a '89 Mustang 5.0 years ago. I used Holley heads and 1.7 roller rockers with a .509 lift cam. Total lift would be about .540. I clay checked the clearance and had more than 120 thousands on both valves.
BE SURE to check your push rod length. Later I bought another brand of aluminum heads and did not check the push rod length because I was swapping aluminum heads for aluminum heads. Should be the same. NOPE. Ate up the valve guides within a thousand miles.
Dwight
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''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
Last edited by Dwight; 06-22-2017 at 06:36 AM..
Reason: sp
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