190HP Walbro on stock FPR?
 

Would I be fine like this?
The Walbro fuel pump while the car is NA and stock FPR?

yes

Yes, the stock FPR on the rail will still work as normal and there won't be anything different as far as the engine is concerned.
I'm of the mind that it's a good idea to install parts over time so you can see how thing individually effect the car. If you install 5 parts in one day, then start the engine and things don't run right, you've got five parts to troubleshoot. Prior to installing my turbo, I'd installed the fuel pump, AFPR, Bipes, O2clamp, dual feed-rail, injectors, intercooler, and tapped the pan. The only problem I ran into during the install of the manifold/turbo/piping was the clearance of the stock radiator tube that feeds the heater core. I replaced that pipe with one from an Escort that fit better.

all the fuel pump does is deliver fuel. you could have a 100lph fuel pump and be ok.

the 255lph are known to push too much fuel and over pressurize the rail, so that's when things aren't fun. otherwise, it's just there to delivery fuel , nothing more nothing less.

Alright Cool. Thanks guys :D