40 skater pleasure classic deck, 1180hp, 5 blade merc cnc 17x37x18rake, 1.35 gears, 6400 rpm , wet sump 6's. thinking 145-150mph should be close. does anyone have any experience, also what would be difference between spinning in vs. spinning out, 3,25" x dimension

Mr. Dar,
I thought you said you sold that old dog and bought a new 388?

Did you take those stupid boxes off it yet???

Should run over 150 if its setup correctly. Spinning the props out will be faster.