i have a 91 rs with a 350 tbi the motor has a 305 tbi and computer and i was wandering if i baught some injectors that were at like 61lb ph and and some kind of computer upgrade how much power would i get sorry if i cant be more specific but im more of a carb guy

So you have a 350 motor with the factory 305 injectors and ecm (prom)? With that setup and the factory fuel pressure you are probably pretty darn lean.
A good start would be using 350 injectors and a 350 prom. Or you could do an adjustable fuel pressure regulator. The best solution would be a custom chip, 350 injectors, and afpr.

The injectors themselves won't make any more hp, but with the stock fuel line pressure they can "support" between 205 and 230 hp (assuming a max 85% duty cycle). If you crank the fuel pressure up to 20 psi they should be good for 255-285 hp.

find HP potential here...http://www.users.bigpond.net.au/ben_...ctorsizing.xls