Quote:
Originally Posted by Skip Fix
I'm standing by my comments that a 0.150 longer body rocker arm- trunnion to roller tip-is going to be way off . Unless you use a lash cap and a really short pushrod for sure. Even my 1.8 BBC with a 0.090 offset trunnion is a lot shorter pushrod.
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I'm going to double down and repeat what I said before. The OP's problems (including the first engine failure) are the direct result of the rocker misapplication. With Pontiac rockers, the pushrod length should be 9.20" just like the RA IV heads that the Edelbrocks are patterned after. The rocker arm ratio (1.5 vs 1.65) doesn't change anything enough to warrant custom length pushrods. Yeah, you can split hairs but the 9.20" pushrods are adequate unless a reduced base circle camshaft comes into play for extremely high lifts.