These are listed in the Radio reference Guide, here in the Tech Tips. Here is the link:
http://www.stovebolt.com/techtips/radio/guide.html

There is an early "slant back" model and a later "straight back model". Both are appropriate for your truck although I think the straight back came out in 1952. They look the same when installed.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!