this a big block install on the same boat that I have

http://images.traderonline.com/img/6...55773606_2.jpg

and here is my install on a Small block I dont see much differance, I do have EMI THUNDERS W/ CORSA Q&Q II

This is a far apart and high as you can go on this boat
otherwise the tips flange will not sit flat

Ha, The 6.2 mpi is a much better motor than the 7.4L . The torque numbers are not that great on the 7.4. No you do not just want to put square port heads on the 7.4. The 7.4 lack of power also is because it is only a 8.5 : 1 compression ratio. If anything put 110cc oval port heads to raise the compression ratio to 9.0:1 and do not run anymore rpm's than stock because you will break that cast crank. The 6.2 mpi is a better motor than the 7.4.