Denny,
all I would have to do is look up a GM radio of similar vintage and modify the circuit as necessary using the other schematic as a reference. The AD radio is really the exception. I only know of one other Chev radio that used that design.

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!