noob here, have a question

[PNY PWR]

Only thing done to fuel system is a 155lph pump, so I should be ok there I'd think with the 5-6 psi.

Is the Kirban a decent AFPR? It's at the price I need. I'm prolly just going to put one of the small FP gauges under the hood.

After I replace maf, inj, and TB can the FMU be taken off? How do I know what maf and what size injectors to get? Do I get them based on boost level goal? Is there something that tells you what size injector to get according to what boost you're running?