how many injectors will i need to get for a 305tbi to 350tbi swap?

 

There are only 2 injectors on a TBI. The Police ones put out slightly more PSI than the regular 350 ones. Some people use 454 injectors, although Im not sure if you need the 454 TBI or not to run them. You can bump up the PSI slighty by increasing fuel pressure to the injectors by doing the adjustable fuel pressure regulator mod (quarter mod) that is part of the "ultimate TBI" mods.

 

The 305 are 55lb/hr.
The 350 are 61 lb/hr (police are 65 lb/hr).
The 454 are 75 lb/hr i think.
This is at 12 psi.
With higer pressure they can handle more hp.
Ex 305 at 17 psi are 65 lb/hr.