Cam selection help

Being how it's a rolling start, i'm not sure how the converter will make much difference. I would think tight is good. As far as cam, a custom grind would be the best way to go. Most off the shelf circuit/circle cams seem to be in the 3500/6500 range and solid. I would think a 106/108 lsa would give you the mid range torque you'll need.....I'll throw out this Comp hyd, but i still think some phone calls with your combo will get you better results.
http://www.summitracing.com/parts/cca-20-601-4/overview/make/plymouth

Should mention that with the 1.6 rocker ratio the Int. lift is .530 and Ext. is .514.