ET'S with ported J/or other iron heads SB

I have run 6.60s 1/8 101mph and 10.59 1/4 124mph 2900lb 68 dart 365ci 590cam on alcohol with a m1 intake 750carb 4.88gear terrible leakdown 15year old hughes street ported heads. Have a set of J's I'am thinking about having fully ported since I have the KB 191 piston I want/need to have a open chamber head. Momma mopar just doesnt have anything available anymore niether does aftermarket sources without changing pistons.