Before he takes it back in to the tranny shop he might want to re-install his stock intake. The tranny shop might want to void the warranty if they see that. The smaller pulley can stay as I'm sure they will not notice that unless it is a color other than black.
BTW, I only have a CAI, 180* t-stat, Belden Max 8mm wires, NGK TR55 plugs (.056" gap), BCS mod, and a fully cleaned TB and SC inlet and I can get some nasty-bad 2-wheel burnouts.
Even when I just had the CAI and 180* t-stat I was able to leave 20-30' twin streaks.
I'd definitely say something is wrong with the tranny or something. You should have been able to do this long ago.