Re: 1965 WARDS 14ft Aluminum V-Hull boat and adding a floor, could this method work?
I'm not sure it'd be a good idea to remove the seats & foam based on having found a similar boat. W/out the naval architecture drawings showing that the 3bench model is built out of the same hull (material thickness, bracing & re-enforcements, ribs, gunwale construction & attachment, rivets: size, number & placement, transom & it's connection to the stern), and matches yours in most cases, it may radically alter the handling properties of your boat.
Of course, if you stay in smaller, calm flat water lakes & ponds, rarely have other boaters nearby, and stay under the 18hp rating, you may find it's structurally sound to do either of those mods (foam & seat removal).
Removing the seat appears to mean having several rivets to fill or replace along the edge of a rib where the bench attaches to the bottom of the hull. To remove the 1, & reposition the other 2 to better space them out, and attempt to maintain the center of bouyancy, there are now lots of removed rivet holes to deal w/ and a bunch of new thru hull rivets to install. Additionally, the bench support that is riveted to the hull seems to change it's bottom edge shape to match the contour of the hull where it is currently attached. Move the bench, & you'll need to remake new correctly contoured support pieces for the 2 benches you move. Seems like a whole lot of work for a 14' semi-v boat.
I'd think seriously of using it as much as you can basically the way it is. Perhaps extremely cleaned up & looking better, w/ minimal expenses, effort or time, and put it on the water, w/ a for sale sign on it while not in use or sitting at the dock. Then start your search for a 14' 3 bench model, with a great, less questionable motor (overheating problem as I remember). I'd be surprised if you make it to fall this year w/out finding a rig that suits you & your purposes much better. This is essentially how many of us end up w/ many parts & pieces of boats & motors, and more then 1 boat project. I bought the Jet because it fit what I thought I wanted, almost usable as is, w/ working motor & trailer (ok, a barely~kind of working trailer), all at a price I thought appropriate. But it seems to be a less then perfect fit, I will still get it in the water & in use, as quick & as safely as I can. I will probably let it go for what I need to get to justify another project, which isn't much, but that project is on hold until the Jet is in the water again.
But it is of course your boat, and you may build & change it as you see fit to suit your needs.
So all of that ^^^ is just IMHO..... Anyway you finish it, enjoy the project & the fruits of your labor.....
Have a great bottom half of the week....