Basically, expect a larger usable rpm band. Your stock truck governs out @ 2600-2700 rpms. Now you will have full power to 3k. No more power than before, just more RPMs with power.
I done mine but the power in the 1800 to 2100 dropped way off and I put it back. It just moved it up the rpm scale and I wanted the same power at 65 to 70 mph range.