I put some numbers together, these are ballpark - NOT exact!

~ 410,000 cars built for '70 at Hamtramck & Los Angeles

1 out of every 5 cars was a Challenger body
1 out of every 20 cars was a Challenger R/T (incl. R/T SE)
1 out of every 60 cars was a 340 Challenger

1 out of every 4 Challengers was a R/T (incl. R/T SE)
1 out of every 5 Challengers was FC7 "plum crazy"
1 out of every 12 Challengers was an "A66" 340 package car

&

1 out of every 2 cars was a DUSTER body