Not Ranked
I sure was surprised when I began to look more closely at the flow numbers for various heads. Most often those numbers are max flow and as a result don't show the 'real world'.
For instance it is well known the Boss 302 were running 351C MONSTER heads. But to make them work and take advantage of the flow they had to be turning in the 7000 rpm range. When the smoke cleared it was found the motors simply could not tolerate that high rpm lap after lap and blew up. The big heads were dropped I believe after one season.
Likewise my High Riser heads will easily support 7000 plus rpm, but my cam profile is done around 6200-6400. While I love the original High Riser heads real world' says, medium riser would work as well or better for my current cam\carb setup.
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