I'm using 5/16" X 8.2 Comp Cams pushrods in my 393C stroker. My hydraulic flat tappet cam has a pretty conservative lift and the spring pressures are 100/300. I'm also using Edelbrock alloy heads that have been CNC Ported. In my case, I feel like the 5/16" pushrods are enough.
Thanks,
Chance
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