My downpipes arrived today! I should be able to get them installed this weekend!
In regards to gauges, there seems to be some interference when both the SCT Livewire and the Aeroforce Interceptor gauges are connected. It is odd, and seems to mostly just be the fuel pressure reading, but enough to make me question the other readings when they are both connected.
With that in mind, since our engines already have wideband O2 sensors and I can read AFR with my SCT Livewire, I think I am leaning towards dedicated gauges for Pyro/EGT (1 for each bank) and boost/vac from Autometer.
Any reasons I should consider an AFR gauge instead? Or should I forego EGT and do boost/vac, oil temp, and another gauge?
I really appreciate everyone's feedback! Learning what I need to pay attention to on modern vehicles had been a education

It was so easy when it was oil pressure and water temp.... There has been a steep learning curve coming from carbureted muscle cars!
Thanks everyone!
Don