Quick question - dual circuit brakes

[cattlerepairman]

Is it likely that a 1986 M35A2C with a VIN starting with 292272 has dual circuit brakes?
I thought I had read that the VIN starts with 1040 on the trucks with a dual master cylinder, and that only 1987 and 1988 trucks came with it.

 

[emmado22]

Likely, yes, but without seeing the truck it's impossible to tell. If it was an "on of the first off the line" for the USAF contract run of 1986-1988 trucks, then yes it could.
Look for the BRAKE light in the center of the dash cluster. PM me for more info.