Bill, The block #'s show a 59-62 261, the head #'s (that I could find) show on the 54-55 235. Some of the more knowledgable members could elaborate about compatibility issues if there may be some. Also you might talk to Tom Langdon-Langdon's Stovebolt Engine Parts Co. (586)739-9601 or Beck's Machine & Tool-(805)925-7411.
