First of all:
It helps those of us trying to help you if you could please fill out your signature so we know exactly what you have, (Year, Manual vs. Automatic. etc.)
Yes, Pyrometer means your EGT's.
I'd recommend RiffRaff Diesel, when I bought my ISSPRO gauges and overhead gauge pod w. glowplug light a couple months ago they were cheaper by a couple/three 10 spot's per gauge, gauges shipped direct from the factory & pod paint matched my interior perfect.
Diesel Manor and many others offer some great deals, Riffraff just happened to be the best for what i wanted.
I deleted my AIH "Air Intake Heater" (RiffRaff plug) for my boost guage, that was simple. I was chicken and had my buddy drill & tap my pyro but as long as you hold the compressor wheel on initial start after drilling to let all the metal shavings get past your exhaust wheel you're golden. I installed fuel pressure next but i can't really help you there because I installed a full competition system at the same time & I have a manual so I can't help you w. tranny temp.
Overall I'd say it's pretty easy.