A quick question here.

I am going to upgrade my 289ci engine with a 4 barrel Carburator and Performer RPM Manifold.
This should mean an increase in horsepower (hence the subject of my question ).
Does anybody have a clue how many horsepowers i will get extra ?

 

Maybe around 10. You wont show big gains, unless you have better flowing heads, and throw in a cam, Now you talking some big gains.

 

Yeah, Charles is right....but at least maybe now you will get that sucker starting and running smoothly.