2 busy you could run diesel and gas mixed 50/50 in your H.I had a '47h duel fuel my neighbor has 2 SM 's that are distillate thats the way he does it.I tried it for the heck of it ,but id didn't pull it hard enough to get it good warmed up. It will sputter if its not hot.Thats why they had shutters and hot manifold. Just FYI. TJ