Diferential gears swap

Howdy,

I have an '02 Suburban 1500 2WD (LT Autoride), I might want to use it to pull a 7500# trailer. I know this might be pushing the burban a bit, but since a new truck is out of the budget, I am thinking to change the stock diferential ratio to a 4.10 ratio and gain some margin.

Any suggestions?

What gear are you currently running? Tire size?

5.3/6.0/8.1?

Engine is 5.3 liters. I believe the tow rating for this burban is 7400# using the standard diferential ratio. I want to convert it into 4.10:1 ratio. I figured it should be a lot cheaper than a new truck.

Also, the tires I got are Michelin Cross Terrain 265/70-R16 (Standard size)

I found what I needed to do the swap:
http://www.accuautoparts.com/axledetails.jsp?parts_id=MOT:GM95-410