I'm quite sure I would NOT be using those dude. Those look almost as bad as the old floor did!
I wouldn't trust 'em. Last thing you want is all your hard work to go up in flames, let alone you're only gonna have family and friends in the boat with you......... You can pick up some good S/S imcos or russels around for well under $300-$400, with mounts. If original is what you're after, I got a Street Rod shop here that can fab a set up, or near you, I'm sure CJ222 can.
Don't take a chance by putting in 2 15 gallon or so time bombs in the boat. Just my .02
Ray