I have a 99 38" Fountain with about 650 horse running about 90 mph. I am thinking about switching stock Bravos to an XR or Imco shorty. Has anyone tried changing drive heights on this boat?

-1 imco on a '98 38 was the right height. -2 porpoised. Similar n/a power.

how much speed did the -1 inch gain your '98? did your time to plane change much?