did you wpe a lobe on the original? or just trying to beef it up a bit?
do you have an idea of what your preferred cruising RPM is? I rememebr you have a TH-400 trans (1:1) but cant remember what rear and tires you have...
we cant go with anything too wild as the stall speed on the converter is likely 1400-1800 on that bus..
I have used the comp cams in the past with good success..
COMP Cams: Dual Energy™ 255DEH; Hyd. Flat Tappet; '58-'02 Chevy Small Block
this one is a smooth idle.. gives good low end torque but will not be as aggressive in power at the higher RPM (above 4000)...
they make a 265 which is a bit more aggressive but also creates a bit more rough idle... rough idle sounds bad-ass but can be cumbersome if the torque converter stall is too low..