Was scanning an original Color and Trim book when I came across this insert that showed the factory totals for each color and some popular options for the 1972 model year. Pretty easy to do some basic math and know how many of each color were built. Here's a link to the documents (the full book can be downloaded from the E-Bodies.org Resource Library):

https://forum.e-bodies.org/reference-material/18/1973-plymouth-color-and-trim-selector/1998/


From those documents we can figure out that there was 775 TX9 (Black) Barracudas in 1972. Compared to 2,232 TB3 (Basin Street Blue). One of the rarest factory colors would be HT6 (Mojave Tan Met) at 166 barracudas.

Pages from 1973_Plymouth_Color_and_Trim_Selector-4.jpgPages from 1973_Plymouth_Color_and_Trim_Selector-3.jpg
1970 Challenger T/A 4-Speed
1970 Challenger T/A 4-Speed
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1970 Challenger RT 440+6 4-Speed
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1971 Cuda 4-Speed
LOOKING to BUY 1970 & 1971 E Body J, V and R Code project cars