Fuel Pressure And Other Mods

[Alpine TSi]

Hopefully someone here can explain this to me,

I have my next setup on the way and am wondering if I have all I am going to need to make it work without blowing stuff up.

I am going to be running:

EVO3 16g, will be ported with 34mm flapper
FMIC
Stock 1G manual cams
Stock 1G MAS with dejon tool intake
2G O2 housing, ported
1G Exhaust Manifold
2.5" exhaust
Walbro 255
AFC

It is going on my 92 TSi with 171K but great compression all across.

Here are my questions:

I have a set of 510cc injectors I will probably be getting rid of in favor for a set of Fuel Injector Clinic 650's. (Shane hopefully I didn't miss the boat on a better price than 320 but if I did it is okay) I am told these will be enough, but are they possibly too much? I want to give myself some head room when I decide to get something else(not soon, but possible).

Also am I going to need some type of AFPR? If so what kind and how much would it run?

And what would be the recommended boost levels for race and street given this setup?

Finally are there any other things anyone could think I would possibly need on top of that listed above?

Sorry about all the newb questions but I want to make sure it is done right and I am sure you guys out there know how to do it that way.

Thanks in advance.