FYI...I know that the back from a 40's? Pontiac radio will fit a later flat backed AD radio. I bought a '42 (well that's what was marked on it anyway) Pontiac radio at the Portland, OR April swap meet a couple years ago for $10 just to get the back off of it for my AD radio. The Pontiac radio is very similiar to the AD radio except the profile is not quite right. I found this ad on E-bay a couple weeks ago where a guy was advertising a Pontiac radio (that looks like the one I bought) as an AD radio. An E-bay user quickly corrected him, but it was still worth $100 to somebody out there. Apparently the E-bay seller had actually taken it out of an AD truck that had the dash holes slightly widened. Take a look....
Pontiac Radio on EBAY PS...the Pontiac radios are a bit different internally. I do know that the tuner is a different style than the AD radios use.
