Re: GT40P heads and 1.7 rockers ?
Stock GT-40P heads actually lose flow after .500 lift... why you want to increase the lift of your valves by adding 1.7:1 rockers is beyond me.
Also, I hope you have upgraded valvesprings in them, the stock GT-40P springs are only rated for .500 lift which means if you didn't opt for better valvesprings, you'll probably have binding with that cam/rocker combo.
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