Was just trying not to get off topic about revs. LOL
Will ask my dad when I see him next. He is having a whipplecharger put on his motor and has done a lot of reserch on things like this.
Rely you are only looking at 42 cubs difference 318 VS 360. Don't know that it would make a lot of difference when you go putting on a blower that tricks the motor in to thinking it is bigger than it rely is.
