I'm looking at getting away from the diesel headache with all of the emissions etc and buying a mid 90's 3/4 ton Suburban, my question is how do they tow? My boat (29 Fountain) weighs 8,600 on the trailer. I know I'm not going to be able to tow at 75 up the cajon pass with a older gas engine but aside from that, please let me know what you think.