mopower could you post more pics of the pump install?The only brass pump that I can find on the site is closer to $250 and $45 for the bracket do you have a part # for your pumps?

I had a cam driven water pump on a 350 in my 1975 18' Donzi. It had a Volvo 280 drive with no impeller in the drive or crank driven seawater pump. It drew water in just fine and cooled the engine great. Believe me, I did not baby it either...
I too have thought about using the same setup in other boats; it is such a pain tightening belts...
I have spoken to a number of marine mechanics about making the switch. I have not found one the has said it's a good idea???
A cam driven pump runs at half the speed as a crank driven or belt driven pump so there is no way that it can flow as much water... 3 out of 4 of the marine mechanics I have spoken to don't even like the idea of eliminating the circulation pump for a cross-over set up. You don't realy gain HP, and the more flow the better...
I have a gen VI big block Volvo setup now with a crank driven sea pump and serpentine belt driven circ. pump. By far the best I have ever had...

Dyno,
I'll get more picks tomorrow, I'm at work right now. I am looking an ad from Basic Power right now and it's $99
I did have to modify the bracket just a little. The original set up had the inlet/outlet of the pump staight up. I rotated mine to abour 8 o'clock. Used a longer hose in from the outdrive right past where the Merc pump was. Also added a gate valve so I can shut it off while in the water and change the impeller without sinking

That looks about right sut, I'll check mine tomorrow. Its for a BB application. The small bock one is a little shorter. When I talked to them they stated it was used on a number of inboard engines.

JimV was going to use an electric pump, but for reasons I can no longer remember, he chose NOT to.

cool !!!now I nned to figure out what to do about a fuel pump.....no prvisions on the block so I guess I need an electric. Any reccomendations for an internally regulated one thats good for say 600hp?

Dyno...as requested,

After looking at it I remembered the original design was for the hose connections should be on the right( looking from front) along with the bracket. I flipped it over to the opposite side and redrilled the bracet and gave it a little twist. Works great
Note the belt in place , ready to swing around and use incase the other were to break. The hose and bracket keep you from simply installing the belt as usual.

Top hose is in. Bottom hose is out , going to my oil cooler mounted sideways over the bell housing.
I can still use a mech. fuel pump since I have Merlin blocks.

And yes that is the correct# sutphen10 gave you

Thanks man that looks like a much better way to pump water to me!!!