You might try these guys. Classic has a separate division (located in a different state if I recall right) that does early oem stuff. Not sure about the aftermarket units, but probably worth an email. I used one of their kits in my 55 bird. It was ok, and it did bolt right in. This is the restoration link. https://www.classicautoair.com/rest...b6u51rOWruJhErELmsxXbins2_FjR4vUdGxMSKY0mT_Hw
Thanks it was reading one of their manuals that got me interested in what the manual for mine would say.