Pushrods And Trick Flow Heads

12many said

Looks like an early pattern is developing here favoring 5/16” pushrods. I’m kinda hoping to hear from some 3/8” users myself.

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Why? If 5/16 work, why would you go with a thicker (possibly heavier) pushrod and potentially have clearance issues? I have used Smith Bros 5/16 pushrods in my last 3 engines, riding on solid roller and large flat tappet cams, no issues at all.