Bedlam wrote:
I think that combination will work for the OP. If he starts to travel the Rockies more often, I do think the 4.10's would be better suited for the gasser. I doubt he would lose any mileage doing this gear swap unless he drives fast while unloaded.
The payload thing between a gasser and diesel is bunk. The weight changes up front, but the rear axle weight remains about the same - I don't know anyone with a cabover heavy enough to worry about front axle weight.
Carrying the AF811SB on a long bed is no issue. If the OP already has a SuperTruss for his GM, it should be the same length needed to carry an AF992 on a long bed. The OP will need to buy new tiedowns and receiver, but the FastGuns can be used on the new truck.
Bedlam,
Thanks for your input. Yes I do have a 36" SuperTruss and FastGuns on my GM. I've priced a new SuperHitch and tie downs. I'm going to call the local Ring and Pinion Shop for an estimate on 4:10 gearing, which I think may be the way to go with the HEMI.
I like the AF 992 but I haven't actually been able to see one in person and according to AF it weighs about 350 lbs more than my 811 (dry weight). I am not interested in a 990 as it's just a stretch version of my 811. Truck camper dealers are pretty scarce here in MI. Still haven't made a decision on the RAM yet.
TG