Do yourself a favor, call @ BBlades propellers, he has a great test program, has a ton ok knowledge to boot.
I'm gonna have to disagree on Joes statement on being geared wrong, there are a few as I am that it's better to spin a larger prop slower than a smaller pitch prop faster, the theory is lower slip #'s with 300 HP I really don't think your gonna hurt your 1.62 gears anymore than you would with 1.5's
I personally am running 600 HP through a Bravo drive with 1.65 gears, granted I do have some gear wear but I think this is due to spinning it to 6,000 rpm.
Im no expert on the Minx hull for which I've never had one as Joe and Gary have experience with but I still will say if you get it proped right a 1.62 vs a 1.5 drive will prolly be a lil faster on the top end and have quicker accelleration.
Good luck test as many props as you can and have fun.
2006 CLASSIC 18 WHIPPLED MX 6.2, BRAVO 1, STAINLESS MARINE EXHAUST, LATHAM STEERING, IMCO 2" SHORTY, LABBED MIRAGE PLUS
TALK IS CHEAP, I'M FROM THE "SHOW ME STATE" SHOW ME