weird 71-74 am/fm radio

[72 BLUE 400]

anybody know anything about what this radio came out of,i pulled it out of a 73 charger,it does work,but has no mounting threads on the volumn/dial arms.it does have 2 small mounting holes with threads on the underside.and has the usual side mount for the bracket.all the 71-74 b-body radios i have seen have threads on the volumn/dial arms for mounting in the gauge cluster.any hints as why this one does not have threads??

 

[YY1]

I think that's the high power 4 channel amp with the cassette recorder lead! SCORE!

 

[moparmarks]

Chyrsler quality controll at its finest
Is a 72-up B am/fm without tape deck lead

 

[72 BLUE 400]

radio

why no threads??seems you would have to drill holes in the dash frame to install it.