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Driving on the street you will most likely be ok with pump gas, unless you want to get on really get on it , that closed chamber with help you with lower octane fuel. Just my 2 cents

Just a little Isky .525 lift, and its just a 440 stock crank

We built a 440 with 516 heads and 2.14 intake and 1.81 exhaust valves, with flat tops, its not quite 11-1, customer adds just a splash of 110 octane, it runs good in a Duster 11.00's in the 1/4

Yes in i did some clean up.

Weight 3480 with driver, flat tappet cam, 10.7 on the comp, pump gas, at the track splash of 110 octane, 850 carb, 3.91 out back.

We just finished a 440, that has the 516 heads with oversized valves NO port work, flat top pistons and just .525 lift cam, that ran 11.11 and 120 in a Duster street strip car, your will not need a stroker motor to run mid 11s

I think it all comes down to the right combo, with your current heads, you could make plenty of power, are you trying to reach a specific number for racing for an specific ET?

You are correct the H.S. rockers do have bad geometry, and they are a good rocker not great, my point was, if the rocker is stamped 1.5 it should be 1.5

I purchased some PRW rockers, and the ratio turned out to be 1.4, and that is no good, i have some 1.6 steel rollers, they came in under 1.5, Harland Sharps are a true 1.5 or better, I say you have to spend the money on good rockers or you do not know what you get.

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