I run a 'B' with my 454, which sounds a little milder than your motor. The most important thing is to keep your motor above the power curve of the impeller aal long as possible. It wont matter if you make 900hp at 8000 rpm if you cant pull 300 at 4000 or so. Ask this one on WWW.REALJETBOATS.COM, (http://WWW.REALJETBOATS.COM,) there is tons of good info there.