340 build .30 over

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Yes i know, and i appreicate all the help since i have a set of 318 rockers, im going to use those, cant be as bad as the procomps.

your picture shows dual springs with a damper....those springs will punch the pushrods through the 318 stock non adjustable pushrods..
 
That's odd. Is that the matching springs for that cam? It sure looks like a duel spring
 
Yes. The Thumpr cams require dual sprAngs. I agree. Those will ruin stock rockers. Look for you a set of the stock 273 rockers.
 
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