Hi, looking for some advice on propeller pitch or what pitch people have used with similar engine / craft. I have a 1975 Delta 25 Deep V power cruiser, and run a new 5.7 v8 vortec 300hp assumed, running an SEI alpha Gen 1 1.50-1. The boat currently has a standard alloy 19" prop and whips up on the plane with no dramas pretty darn quick but tops out at only 35 knots and only revs to 4100rpm and I understand that 4800 is optimum for this engine, I have just taken the old flame arrestor off which I am led to believe is too small and put the correct one for the carb on (much bigger) and I had some inline exhaust mufflers which looked very restrictive which I have now removed, so I might gain some revs there. Before I re launch I want to put a stainless prop on it so should I go down to say a 17" ? is 19" over propped for this setup? if I do put a stainless one on I was thinking Michigan wheel ballistic. many thanks in advance.