I didnt notice huge gain from any of my mods fter the pipe, head and prop. I also kept the stock airbox. I did a lot of my mods at the same time so the little ones i cant say fpr sure which do the most. I was disappointed that my msd failed but in msd defense it was a used one from a b1 a friend parted out. I did not notice any changes when i went back to a stock ignition but it may have been due to the msd failing. Reed stuffers provide a nicer transition from the round intake manifold to the square reeds.
I dont have msd on any of my boats, i have dual stage reeds, stuffers, heads, pipes and zero flywheels on both of my limiteds. They way i like to spend my money may not be the best way for you to spend yours. Im a believer in msd but they do fail and that puts a bad taste in my mouth. V force reeds are a little rich for me still.