I really don't know what to do with this. Comparing a Jeep to a Chevy truck should be in the Greasy Spoon.
How your truck will tow depends on a lot of factors, like what do you want to tow. What ever it is, you don't need the parking brake on to do it.
Determining rear end gears has been covered dozens of times in Engine and driveline. Try a search.
The truck's weight is covered in the Resto-pac. Have you ordered yours yet?
In the future, please ask one question per post and ask it in the proper forum for the question.
