The GMC AD's used full pressure engines so the gauges from those trucks are
60lb. I found one in a used GMC gauge cluster at a swap meet. The temp
gauge was cut and the fuel gauge was fryed, but I snagged it for that 60lb
oil gauge. It's cream colored with a red needle but I can always put a
chevy decal on it so it's the right color, and my '48 has red needles on the
rest of it's gauges.
The bigger AD trucks used full pressure engines, I believe, at least I know
they made 60lb AD gauges, I found one NOS for my '53. They're out there; I
found two in the last four months without too much pain. Try checking with
some of the folks with the AD junkyards.
Barrett Revis
Sparks, NV
'53 3105
'48 3105
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