LOOSE THE MSD HEI! USE A BILLIT RACE DISTRIBUTOR,W/HVC&6AL BOX.
SET THE CURVE &LOCK OUT THE DISTRIBUTOR.36-38 DEGREES IS GREAT@3000RPM.
A .688 ROLLER WOULD BE GOOD W/260-270 DURATION@.50 112LC/@110CENTERLINE.DEPENDING ON YOUR ROD TO STROKE RATIO.
RIGHT DOWN ALL THE SPECS ON THE ENGINE AND GET BACK TO ME.
IVE GOT AN EL-CAMINO W/A500"BBC SET UP ALOT LIKE YOURS. I HAD IT DOING FLAT 10's @9:1CR. IVE GOT ALOT MORE TO TELL YOU IF YOUR INTERESTED. I HAD THE SAME PROBLEMS YOUR HAVING.