Yes, the front has discs brakes on them.
I need the wiring diagram on a 1986 Chevy silver ado dual fuel tanks
In front of the radiator. pull off the grill
it will probably be 3.73
probably a 350 small block
In glove box along with options for truck.
18-25 if your not towing anything
That year don't have one.
Do you have automatic locking hubs on the front axles?
Probably around 3800-4200lbs
I find no reference to anti-lock brakes in my factory service manual or other reference works so I assume that they were not available in 1986.
Auto Zone and Advance Auto
The 350 is the small block, and in 1986 it would be GM corporate blue.
No you can't.
the widest one on the timeing chane cover right in the middel of it
If it is an automatic transmission, Dexron III or Mercon are both acceptable.
possible petroleum contamination or a failed master cyl/abs if applicable
Yes you can, but don't drive over 50 to 55 MPH
There is no adjustment. If they are clacking you have worn valve train parts, replacement is your only option.
Freshly rebuilt with good carburetor at 5000 rpm, 200 horsepower maybe a little more
It is a 5" lug pattern. I looked it up on some classic Chevy website. I can't think of the URL for it at this moment though.