When I ran my sand dragger, I used the same tires with Super Scoopers. We had a horrible time mounting them. Now, before someone says use either, I do that all the time on truck and heavy iron tires, but the thin sidewalls of the slicks scared me. We had a problem getting BOTH beads close enough to the wheel to seal, so what we had to do is use duct tape, to pull top bead up, bottom bead dropped, we used a Cheeta tank to set beads, broke the top bead, removed the tape, flipped the tire over to allow the bead to drop down, and set the bead. PITA but it worked.
Bead lock would make it easier, as you can lock the top, bottom sidewall should drop low enough to seat.
Tom