2000 4x2 2.5l 5 spd Standard Cab

I am going to be replacing my rear shocks first, and then the Exhaust system.

What are the bolt sizes for the rear Shocks?

The existing shocks are the originals , yup that's right....
the existing shocks are 16 years old and have been in Wisconsin the whole time.
I am pretty dang sure I'll have to cut them to get them off.
So.... Can any of you tell me what size bolts they should be?

Thanks. Jay