Originally Posted by Warlock III
I'm pretty sure the larger cam would call for more advance as the valves open sooner and close later. I would probably go with the 4+ and see how it performs.
Mark it at both while you're under there so You have a reference point and can do it with just a turn and a twist in the future if need be..
i checked fuel sync was at +2, i brought it up to + 5 and seemed fine than started bucking going down the highway, im gonna go back and set it to 2 again, ran perfect than.