89 7.4 with perf cam, rectangle heads, 5000lb chaparral 2550 sx, prev owner had a 25 pitch mirage on there, only 4000 rpm WOT, so I swapped out 20p Turbo brand prop, boat screamed 5000rpm WOT, better holeshot, better top end, everything better. So I figured I a 22p prop would be perfect, found...