It works, but not great. As Shawn said, you have to redrill the holes in the fender. Moving the rubber bumpers is critical, as they will miss, but there is more to it than that.
I ended up having to put some shims under the rear legs of the seats, so the seat back did not rest right on the roll bar, which caused a bad rattle. I also made my own rear bracket, cut off the factory one and extended it over to the tub wall on the rear mounts just to simplify things, but all this work was done during a restoration.
The rubber bumper things are the real hang up. When you put your seats down now, the seat bottom has a slight upward slant, and the seat back slants back towards window/wall. The rubber bumper lands on the edge of the fender well. After moving it out, depending on how you place everything, the seat will probably be kicked forward with the bottom being much flatter and the seat back straight up, equals far less comfort. But the support bumper is now 2-3 inches further inward. One of my seats, from prior use this way was bent, due to the lack of support. The seats just can't hold up with the loss of support.
I moved my bumpers back and reinforced the mounting point and put a welded nut inside, just like the factory mount, but I also fabbed up similar mounting points on the leading edge of the seat and made swing down legs to support the seat. This has worked very well, especially if you intend to use the seat very much. If you just drill a new hole and bolt the bumper to the sheetmetal of the bottom of the seat, it will bend.
I'm personally looking into bench seat alternatives now, the jump seats are awesome, but now I have a little girl, and the jump seats are worthless for legally transporting children now a days. Guess I'm going to have to upgrade. I'm considering either a ready made bench, a suzuki rear seat, or using two newer style jump seats and modding them to fold down, like a bench from each side for a more factory look.