It's admirable how you're trying to follow the specifications listed on the Edelbrock FE Performer RPM Head instruction sheet. But have you looked at what else they require on that sheet besides the 1.76 adjustable rockers? They say to use Ford B8AZ-6565-C pushrods with 9.180" center of ball to center of cup and 9.370" overall length, 7* x 3/8" valve locks (#9612), 30* intake valve seat, 1.55" diameter springs installed at 1.885" with 120 lbs seat pressure, and so on.
So if you use different valve springs, retainers, valve locks, pushrods, rockers, than what is listed, I guess the warranty is void. I don't think you can get those pushrods anymore. Also if you read the warranty on the Edelbrock site, they state that the warranty is void if the product is changed or modified in any way or used for racing. So if you do anything to the head or take it to the track, the warranty is no good.
I think they have covered themselves pretty well.
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