Post your 12 second small block combos
I realize you are not asking for stroker combos but have you considered a stroker? Are you driving the car on the street or driving to the track?
I have a Scat stroker crank and KB forged pistons (340/416). Its about 9.5:1 compression with stock X heads, Comp Cam xe274, Airgap, Edelbrock 750, mopar dist w/chrome box and Hooker Headers. It runs great on the street from idle to 6000 rpm with pump gas, has loads of torque and I can drive it almost an hour to Etown. It will go 12.8 with 3.55 gears and a 4 speed without really beating on too bad it to do so.
It seems to be a pretty good balance for a street car that gets some track time. The money spent on Edelbrock heads could be spent on a stroker kit. Just a little something to help complicate matters for you.