I haven't owned my Burb too long, but after working out some bugs and putting in new injectors, I like it.
I've already put on a remote mount FSD cooler and newer (lighter) wheels.
Since I have a leaking rear wheel seal, I'll be replacing the seals and doing rear brakes soon. I would like to upgrade the brakes, but I don't see too many cost effective options. While I'm in the rear end, I'll be rebuilding it with a taller gear set, as I have 4.10s now.

My question is, what should I do next?
I'm considering an intercooler, dual thermostats mod, gauges, 4" exhaust w/crossover, and maybe some Bilstein shocks.
I drive the truck a good bit, but don't tow alot. I'd like to get a little more power out of it, while increasing the fuel efficiency.
Any suggestions?