i got a 99 chevy 4x4 ext cab thats on 22's and 35's i am planning on going with cold air intake, exhaust, throttle body spacer, and a good efi live tune, maybe as time moves on i may upgrade some more but thats a good while down the road. with the items i just listed can someone tell me what parts i should beef up in my tranny and what stall converter i should run with the stock cam. keep in mind i do pull trailers from time to time. some heavy bud most of them are light.

 

with those mods the stock tranny would be fine. Do a search for the vette servo mod. That will help. Also, dont waste your money on the TB spacer. If your set on the stock cam than a trailblazer I6 converter, will stall to about 2400.

 

ill save everyone else from saying but 4l80 swap depending on budget
As far as keepings stock tranny and those mods i would go with AndysC3 he said pretty much same thing as i was planning on
However if you want to go more mods in the future and 80 swap is nice to have the reliability IMO it depends on what your future plans are