What stall converter do I need?

OK so a fun street car, it sounds like. For me, I would go as low as I could on the TC stall, just to keep the thing from spinning a lot of unnecessary RPM's to be moving along.

And the reason I ask about the CR is that a low CR is going to need some help for a crisp launch, but a higher CR is one where I would be willing to shade a step lower on the TC stall for a fun street use car; the higher CR will be 'up on the torque curve' better. Your real CR is likely in the low to mid 9 range, which is pretty decent for a street car. As CB said, that ought to be spinning those 'not too tall' tires with that cam and setup.

As you have perceived, cam timing can have a dramatic effect. That Lunati cam comes with a 4 degree ground-in cam advance. So with things installed straight-up, the cam should be timed at 4 degrees advance.