get quench. It'll be a pita w open chambers as the OC head recesses need to be machined to equalize the slope/depth of them then machine the KB quench pads and several mockups (why I like floating pins) and carefull measuring to get .035-040" on each cyl but this will give you a spot on foundation (long block) that'll let you run the most static CR and in the end the highest DCR that will function wo pinging w your choice of octane as slowing your timing to compromise this is a band aid that severely hurts power