Which is best for pulling a fifth wheel, short or long box?

If you read his original post you will see he's talking going full time for at least a few years------ 37 foot fifth wheel ,that's going to put you in the twelve to fifteen thousand pound range.(or MORE).

Okay--- so that question was answered if you read it.:S

Long wheelbase is going to give you a much better ride ,and more capability of carrying extra stuff---(in the bed ).. if you're going full time ----you say you are..:W

long box..... better ride

What weight 5th wheel........that is more important on truck choice then length

Another point is that a long box (almost) always has a more comfortable ride (towing or solo) due to the longer wheelbase.

(I say almost, because somebody who has modified the OEM suspension or added air-bags or something will come in and be willing to argue with a fence post about ride comfort.)

ON EDIT: Good point, Bob. I was typing at the same time that you were.

Either one is good. Check into a good slider hitch if going with a short box. I chose the short box, and have a pullrite auto slide and like it a lot. My reason for the short box was partly in the trucks wheel base, figuring there would be better manuvering in camp grounds. I believe you get a better ride with the longer wheel base, but I have no complaints with mine.

Your choice. I use a short box with an autoslider hitch. I wouldn't chance using a short bed without an autoslide. Too easy to damage your truck. If you are going to be traveling a lot, I would probably just do the long bed. I like my short bed, but my next truck will probably be a long bed so I can get a hitch I can remove by myself. My autoslider takes 2 people to load or unload.

Which cab?
I would suggest an extended or quad cab with a short box.
This will enable you to carry passengers.
The short box will or you should have a slider style hitch.

For pulling, the long box without question. Short box works, but is a compromise with non-towing uses.

More importantly, for a 37' fiver, you will want to consider a dually, and as far as I know, they are currently only offered with a long box. When you do the math on the load capacity you need, the box length decision may be made for you.