I have a 98 single cab Sb with 4.2 v6 the 308 rear end and 275 55 r20. I am looking for a custom programmer and tunes for it. I want to change the rear end, add cold air intake. I need more power to tow my camper, boat etc. any suggestions on rear end and programmer?

Thanks a ton,
Dylan

 

Automatic or manual transmission? How much weight will you be towing and how much payload will you be putting in the bed?

A programmer can't correct the speedometer/odometer on a 98, you need to change the gear on the speed sensor.

A cold air intake won't help with anything, waste of money.