<VV> GM idntification please

[Michael Kovacs]

Can someone find the application for this part number?
 
GR 9.645
1 #994278
 
Iy an FM antenna kit for a Chevy/GM pickup truck about 1972. I purchased two to get the solid FM mast for my '69 Corvair. The solid FM mast just replaces the 3 part AM mast. All the rest of the hardware is primarily for the truck side mount near the top of the pickup fender.
 
I'm looking for the application and perhaps how long it was in production.