What's the difference's in these TBI unit's?
Are the 305 and 350 the same and different injectors?
Is the 454 TBI larger?

 

Yes , the 350 and 305 use the same throttle body, just different injectors.The 454 throttle body is much larger and bigger injectors too.
-Rich-

 

Just for clarification, the 305 has 45 pph injectors, the 350 has either 55 (truck, caprice) or 65 (cop car) pph, and the 454 has either 80 (early years) or 90 (later years) pph.

 

Is there a 95 pound or 100 pound one??? and can i do anything 2 the 454 to get more power out of it???

 

you can still do the ultimate TBI mods to the 454 TBI. It has the larger 2''ore so you will need a new manifold. I would go with the holley TBI manifold personally. Im a big fan of holley stuff check sig.

 

what can i do other then smooth things out??? and but in spacers and bigger injectors???? I want to stay with the gm parts i don't like that holley tbi it sounds like **** to me..... but i am a beginner.

 

Nothing wrong with either the 454ss tbi or the Holley. They both require a little bit of wiring splicing to get to work, but they produce the same power. I'll just buy which ever one I can get at a better price Time to go to swap meets!!