okay im redoing the 454 in my tahiti.heres what iv got 10.1 comp weiand tunnel dual 650 dubble pumps built by biggs.Im going for 550 to 600 hp. need help with cam decision.want to get max hp at 5800 if possible.running a panther pump any suggestions would be a great help.

  Its been over 10 years since I worked for a speed shop so I'm not going to give any specific grinds, but when you're getting ready to deside, narrow it down to a coupled based on the rpm range you want it to work in and then choose the smaller grind.  Most people will over-cam because they don't know any better.  In a jet boat engine you can run a cam with a closer lobe seperation (106-108 degree = more overlap = rougher idle) because you don't have vacuum accessories and having a narrower power band isn't as important as it would be in a street vehicle.
 
 I don't know much about the panther pump, will it take being spun to 5800-6000rpm?  If not there is no reason to build the engine to make H/P in that range.

I'm sure you'll get some good information from some of the other owners/builders on this site.

Good luck

get the rpms LOWER. i'm not to shure about your pump, which is'nt vary popular, & is more expensive for parts., but a berk starts overheating after 5500. berks are everywhere( parts & acc.) are cheeper than any other pump. also if you go berk & want your new motor to hook up, get at least an AA impeler. & shoot for a rpm of 5500. you'll fly. good luck!!!