I was reading the fuel system setup in the mods page. Where it says to put the union tee for the fuel pressure sensor, it means for an aftermarket fuel pressure sensor right? Do we have a factory fuel PSI sensor? Instead of a union tee (that I can't seem to find anywhere) I was thinking about using the -6AN fuel PSI gauge adapter that Earl's makes. I know what a union is and I know what a tee is, but I've never heard of a union tee, so this was my plan B.

That'll work just fine.