Hey everyone I waa told that the ls1 injectors and throttle body will fit the 4.3 and give 50hp??? Any1 know anything about this and why so much out of not a big difference? Thanx

 

You know.. nothing personal, but think about this:

What is an LS1? What intake does that throttle body sit on? And who the hell did you hear it from?
That said... yep. If you add a supercharger or turbo on it.
Welcome to the forum.

 

Also the fuel rail and intake support a v8 not a v6 so you would also need to add 2 cylinders as well.You would also have to go to an individual coil pack system per cylinder as well. My 99 blazer is my daily driver which I have basically rebuilt. My 425 rwhp ls2 pontiac gto is my weekend rice eater. I know both motors pretty well. That combo is impossible. However an ls1 swap into a blazer is very possible and also awesome.