Yes correct R22 radio code on orig MSO
the car also has prototype 72-4 challenger taillight lenses
like previously mentioned, it was on the show car circuit til the mid 70s and parts got changed as the car got changed along the way
while the whole car hasn't been restored since its show car years,
it was heavily modified twice by Chrysler, then repainted by Chrysler, then Steve J had it repainted back to white
the customizers took liberties with the show cars and so did Chrysler as they liked to option up the cars for the show circut