I\'d probably stay away from them
I'd stick with rubber body mounts. They will flex more in the twisty's and will less likely break the bolts, or bend sheetmetal. This is more of a problem on Broncos though. Your be can twist seperately from the cab in your truck. Actually, my brother had a 3" body lift on his s-10, and the bed mounts kept breaking or loosening. He hated them! So, maybe it would be a problem for you also. As far as suspension, I've only had poly bushings in a 82 Mustang. I can say that they definately stiffened the ride, and were noisy. I won't put them in my current mustang. Not for a frequently driven vehicle anyway. Maybe if it was strictly a race car I would. As far as suspension on a trail truck, I bet that the suspension wouldn't flex as goood with poly's either. Keeping it stiff on the road would also keep it stiff off road. I wonder if any magazine have done RTI tests before and after a poly bushing swap. That would be interesting! Bet the after would be worse!