Brent Riser's Big GRAY

As seen in Gas Engine Magazine

Q. See the photo of a GRAY engine, Serial Number 3082. It has a 6-inch
bore and 34-inch flywheels. I would like to know when it was built, the
correct color and any other information on this engine.
All help appreciated.

Brent Riser
PO Box 1
Tremonton, UT 84337

A. We have Dupont RS903 Red listed as being the appropriate color,
but have no further information. Can anyone help?