273 camshaft selection help

OK cool, I just wanted to be clear. Because if you were not wanting/willing to change out the converter, that would limit the cam shaft profile/size.

2 Comp Cams come to mind. Ethier the replacement 340 cam they offer or the XE268, which has more lift. Considering the heads performance, or lack thereoff because it is stock, but having 3.90 gears for that get up and go, I'd go for the replacement 340 cam because it has less lift.

Re-worked and ported heads would most likely work real nice with the ethier cam, the edge goes with the XE268H. You could probably use some compresion.