I had a BBC396, small dome, maybe .125 with closed chamber heads it had around 11 to 1 compression, 305 magnum cam, weiand team G, 750 double pumper.
It was all torque, shifted @ 5300 with a T400 and a 456 gear, it ran 7.50's to 740's in the 1/8 with short times in the 150 range.
Mine was all strip but it wouldnt of took much to make it a street machine, slap on some muffs mount a set of Et streets and make a gear change you were there.
If I were you I'd stay with the closed Chamber heads for the simple fact it will keep your compression up, unless you have a big pop up piston your gonna kill the compression with a open chamber head.
Cp