c code special order slant six?

slantsixdan said
The 198 was available in the '70 through '74 model years.
The 170 was export-only after 1969.
C-code on a '73 is a plain ol' 225.

Yes, 198 was available but not as the letter C as he said....it was letter B....letter C was 225 in 70-74