GMC vacuum guage

[atomman]

I have attached a pix of an AC vacuum gauge. Does it fit the GMC trucks?:signthankspin:
Atomman

[bigblockv6]

You can make it fit if that's your choice. GMC did offer an optional oil pressure gauge the size of your vacuum gauge that could be mounted in the locations where the Tach, clock or Bat-O-Meter were usually mounted or on 64-66 models the smaller oil pressure gauge would be mounted left of the ashtray.