Originally Posted by boneyard Buick
i know for a fact that a 305 TPI needs 14psi minimum to run properly...
More like 38PSI for a TPI (Tuned Port). 14psi is for a TBI (Throttle Body) injection which is what you may be thinking of.
Its very possible that the pump for the 2.8 multiport provides enough flow and pressure for the injection.
I am running my TPI with an external pump that can be used with both a mid 90's ford 4cly injection and for the 5.0 litre injection.