pm wooter on dieselplace. hes my roomate and just put a 4 in tuff country on his and also tows a gooseneck. hes running a 4 inch with air bags in back with 35s. he just picked up his gooseneck yesterday and towed it no problem.
if your fine with the cali lean then you should have a problem. before you go spending all sorts of money, jack up the rear of your truck to the point of where it would be with the lift kit on and then take some measurements of your trailer just to be sure. but seems like most of the guys on dp dont have a problem with a 4 inch.
if your fine with the cali lean then you should have a problem. before you go spending all sorts of money, jack up the rear of your truck to the point of where it would be with the lift kit on and then take some measurements of your trailer just to be sure. but seems like most of the guys on dp dont have a problem with a 4 inch.