Small Gm 10 bolt question (S10/Camaro 7.5/7.625) Speedo Fix?

[Cannaert]

Ok I want to run a ZR2 rear end in my 2wd S-10 I know it can be done but.
I am wanting to know If any one knows were the carrier break is on them.
I look on a few places and I am finding a mixed bag of answers.
On sit side 3.08, one said 3.42 and one said 3.73.

I love the Gas Mileage from the 3.08 but the limited slip would be awesome for the truck. 

But I may just have to go with one or the other in it.

Last but not least If I got with the 3.73 rear end I need to know what all I need to make the speed work right with the truck.
I have 5 speed in mine (NV3500) and I dont know what to do to correct it.  I have looked on a few S-10 site but there search feature blow.

Thank for the Help.