are you showing .074" above deck, or .026" below?
if they're above deck, you're stuck with open chambered heads.
if they're below, I'd get
these enginequests or
these RHS heads from hughes....
the enginequests will require magnum style rockers (~40-50 used, $80 new for stockers), the RHS's use stock LA rocker gear.
OOTB hughes has found an LA head with 2.02's (576 castings) flow ~212 cfm@ .500 lift, the EQ's flow 227, (with the smaller 1.92" valve) and the RHS X heads 252 CFM at the same lift...302 heads typically flow 135-160cfm on the intake side, and max out fully ported at about 140 on the exhaust...