There's a 1952 supplement in the last section of the 48-51 manual in later printings and reproduction printings.
It's only about 15 or 20 pages.
Otto - Just a note that not all 1948-51 Shop Manuals contain the 1952 supplement. I have an original (not reprint) 1948-51 Shop Manual, printed in 1951, that does not have the supplement.
This being said, I think we've answered Woodcmiami's question and it's time to move along to another topic or question.
