If I was to guess, I would say that would fit the first 331 CID Hemis for the 1951 models

Hope you did not pay to much...I have seen auction fever and it can be scary

1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction
1998 Ram 2500 QuadCab, new daily driver.
2008 Honda Element
2014 Carry-On 7x14 Cargo Trailer