Quote: Going for shorter stroke is a wrong move unless you race in a bad track and you have trouble hooking. If you are looking for more power, playing with different strokes and rod ratios isnīt going to do the trick. Keep the 4" stroke and use the money to increase the airflow and you will be much happier.
I don't know alot, but I would have to agree with this. In fact, I would be more inclined to go up in stroke instead of down if for nothing other then the extra torque it would create and at less rpm (better longevity of valvetrain parts), but the rest of the setup would have to be optimized.
I think a compression bump with what you already have would work out well
