Your most likely after bottom end grunt, so I suggest keeping the cam small, the stock one is a bit too small though. Something about 195 deg @ 0.050 will help wake the motor up without killing bottom end.
Certainly tbi will help if your doing any rock climbing - no float issues to dael with. I'd go with dual 2" exhaust pipes rather than 2 1/4 mainly to get the exhaust velocity up at low rev's.
