Picked up sues boat today

[B&D Marine]

Thanks for the info. Have you compared them on the dyno?

I have not as it would be almost impossible to duplicate the exhaust, load, etc. as installed in a boat. I did a comparison on the lake. Zoomers with "propeller" 5300 rpm's, without "propellers" 5500, IMCO Gatlins 5625, no mufflers 5800. 540 BBC EFI 725 HP @ 6000