Just added four Autometer gauges (pillar mount): Pyro (Exhaust Gas Temp), Trans temp, Water temp and Turbo Boost. Also upgraded my smallish stock 7.3L transmission cooler to the 6.0L Powerstroke trans cooler (twice the surface area). Next mods will be larger-flow exhaust and towing program chip for a little more HP. Love my '99 7.3L Powerstroke (had it 15 years).
2015 Jay Flight 32 BHDS (Elite, Technology, Thermal pkgs, 50-amp)
1999 Ford F-250 7.3L Powerstroke 4x4 Lariat Crew Cab SRW 3.73
6.0L Upgraded Transmission Cooler
Autometer Gauges (EGT, Trans & Water temp, Boost)
K&N Cold Air Intake; MBRP 4" Turbo Back Exhaust
Curt Class IV Receiver Hitch
Prodigy P3 Brake Controller; ProPride 3P Hitch 1400#