3.55's suck for towing if you have 32.8" tires.
Stock tires (like yours) and those gears give you plenty of power (with a 5.9l, not sure about a 5.2).

When I went to 4.10 gears I saw no change in mileage but now it will stay in overdrive when I hit an incline and actually hold speed.
My tires are 33" tall and weigh something like 110 lbs each.

 

265's will fit without any lift at all. The 4.10's would be a great combo with that size tires though. If you put 3" of lift on there, 33" tires will fit in there nicely, and the 4.10's will still be 'reasonable'. (it will put you very close to stock tire size, with 3.55 gears.)

Don't go cheap on gears. You won't like the results.

 

Sheriff was your speedo effected when you re-geared?

 

I don't think so.
I have the Superchips 3815 and it adjusts the speedometer to compensate for tire size.
I think the RWSS tells the PCM how fast you're going according to its readings from the toner ring (right name?-maybe) So the gear ratio shouldn't matter for speedometer reading but I could be wrong.

 

Earlier trucks took their cue for the speedo off the transmission, or t-case, later models (98 and later?) eliminated the VSS on the trans/t-case, and just used the sensor on the rear diff. Since it reads off of a tone ring on the diff carrier, gear changes don't matter to the speedo, tire size does though.

On the 96, you can just change the driven gear for the VSS, to get back to being accurate. (or, as accurate as it gets at any rate.)

 

I have a 96 with 35" tires and 4.56 gears.... since that combo is pretty much a matching set to bring the ratios back to stock my speedometer is right on without any changes needed...(I only have a 3" body lift BTW and yes it will slightly rub when hitting a bump or incline at the right angle while wheels are turned but doesn't usually rub under normal driving circumstances....)
Your gas mileage will be close to stock with a combo like this but keep in mind the larger tires still add weight and will effect gas mpg slightly... it also can speed up other problems like for example the fact that I'm replacing my steering shaft and adding a brace for my steering gear because the bigger meats are harder on all of these components...

 

Try having 33 with 3.55 gears lol and hauling a enclosed trailer with 2 ATV's

 

i run 4.10's with 265/75/16 10 ply tires, and according to my GPS my mphs are 4 mph off....if my speedo says 65, im actually doing 69 according to the GPS, but that may be wrong

 

ok my question is i have the 3.92 could i just buyt the 4.10 gears and switch them out or hows this work??

 

The jump from 3.92 to 4.10, is a bunch of money, for not much gain....

Gears have to be set up properly to run quiet, and last more than 100 miles. Do it wrong, and you can cause a great deal of damage.