A friend of mine spoke to a reputable engine builder who stated that 4.750 stroke crankshafts were too big, and the subsequent large engines they create, won't RPM in a boat, even thought they will on a dyno. The load on the dyno is allowing the motor to RPM, where as in the boat the load...

C'mon guys. How many Whacko Jacko threads do we need, anyway? :)sphss (Yeah. I know I spelled "Boating" wrong. Get over it.) :p