Scan Gauge doesn't scan most peremeters. Korey on GOClub just bought one and it won't even read KR.
Are you doing a wideband?
I decided to get the Interceptor, Innovate LC-1 wideband and the oil pressure sender accessory for the interceptor. Then a rail mounted fuel pressure gauge and a boost gauge. Thats 2 gauges in a HUD pod so there arent a ton of gauges to take your eyes off the road. If you're watching a WB I don't see why you need to look at FP also. If there is a fuel issue the WB will show it. The FP gauge is more for troubleshooting and can be put on a braided hose and taped to the windshield like Merc does if you need to watch it while driving.
Less is more IMO when it takes your eyes off the road. Im my setup I can watch 3 parameters from 2 gauges and they are right next to the HUD.