318

The purple cams like compression, which you don't have. I would stay around 218 degrees at .050. BTW, my 318 in a Dart Sport has ported stock valve heads, 8.75-1 compression, 268/.485" Crower Cam, 3.91 gears, 904 trans w/2800 converter and I'd put it against any similiar built Chevy SB.