help me pick cam re-grind for magnum 360

Check out grind #1236.

http://www.oregoncamshaft.com/Hydraulic-Rol-Cam-Specs.html

If you'd be willing to go to a factory high stall (or someone's 2200-2500) that grind is a really nice one. It would work with a stock converter, just a little better with a 2500.