What are the best mods for berkeley jet drives for a 460 hp big block its putting out 468 hp at 5200 and 470 tq at 4200 so my boat raps to 4200 at 56 mph that was in big white caps with the boat popping out several times. So I believe in good water itl be 60 to 62mph. The pump tag says it has an A impeller. Plan on p 51 heads or edlebrock schould put it close to 550 to 600 hp. Its a sleekcraft sst any pump sugestions as far as set back bowl work what ever would like to get 70 mph at least. Stock pump so far.