Only the part of it. Basically just enough in front of the extension boxes to keep them from dragging through the water.

Should only need a small filler about 2-3" tall on each engine centerline in order to put the drives at the correct height.

Wouldn,t you have to get them down as close to the keel as possible for the right attack angle so not to push the nose of the boat down ?

Awesome. Are you doing the work in Hudson? Where do you boat? I'd love to check it out some time. I'm in peoria.

cool project

I live in Hudson, but my shop is in Colfax. We typically get out to Clinton, LOTO, and Lake Michigan. Come on by, shoot me a PM.

very very cool project. keep us updated! More PICS!!

No... The Keel has nothing to do with pushing the nose down as the keel is the center of the hull not the engine centerline. To get the propellers closer to the keel one would run a stagger setup. Proper installation of the #7M Kits does not require a full bottom so to speak just a transom height that will allow the boxes to be installed at the correct height. The way I designed the Arneson Standoff Box the notch does not need to be completely filled in for a stagger and mostly does not need anything for a side by side application.

How many fountains out there with surface drive,s ?

Tilted Kilt and ???