Which Pickup? Chevy/GMC or Dodge or Ford?

[Phokaioglaukos]

Looking for a Cummins engine with an Allison transmission and the Ford integrated brake controller and other tow goodies.

Actually, I'm just looking for suggestions as to which dealers I should visit for test drives. Where are the dealers with the large truck inventories?

I was set on the Toyota Tundra with its high family acceptance value (everything is relative), but it doesn't ahve the payload I'd need for a 24' trailer. Here is my analysis:

The 24' trailer is 30" from coupler to bumper, so the 145.7" wheelbase of the Crewmax (4-door) Tundra is pretty good. The payload of the Tundra is 1,495 lbs., though. Assuming a tongue weight of 12% of trailer weight, a trailer of about 3,500 lbs. with a 3,100 lbs. car and maybe 500 lbs. of tools, cabinets, a/c, N2 tank and the like, the tongue weight should be 852 lbs., leaving only 643 lbs. for passengers (4 at 200 lbs./each will NOT work), fuel and anything in the bed of the pickup.

Said another way, if one were to really try to pull a trailer at the Tundra's limit of 10,100 lbs. with a 12% tongue weight of 1,212 (I pick 12% as half way between the 9% and 15% of most estimates of proper tongue weight), then there is only payload capacity of 293 lbs. left, just room for driver and one passenger, if that.