who makes injectors for a 2.8L what lb injectors
should I get? Will a afpr from a tpi 305/350 fit
in my fuel rail.

 

Yes, a TPI style regulator will fit. I would highly recommend the Holley, since its design makes it easier to adjust than some other brands (we adjust Redraif's by pushing the knurled edge with a screwdriver...its tough to get your fingers on, but srill far easier than others).

Someone here said they used 305 (19lb) injectors and saw a gain...not sure what the factory rating on V6 injectors is, though.