CR and pump gas question

On hemis we ran the piston close to the sides of the chamber and at the tops
single plug are different than dual plug
you need to leave room around the plugs
if you go big bore you can do circular quench all the way around at the deck
helped in round d round where you got down to lower revs
high rpm not so much as there is plenty of turbulance
did not do it back then but I'd try coatings now and longer rods and lighter pistons
the short deck motors ran better but I never ran a shorter deck than a stock 400 with conversion heads and 426 crank RB hemi rods but that gives a hint to the theory