*Realistic expectations..C-mon jump in!
A stall based on the cam specs is a good start. Purchase the converter last once you know of everything else. Starting with a look at a converters site and getting a look at the information they require for a good converter to be built to match everything up well.
Is there a mileage requirement for this project?
The mutha thumper cam is large - ish for the street and would need a decent gear ratio in order to perform at it's best. 3.23's are a bit low IMO. I would limit the cam spec to a 220 intake duration with such a gear ratio.