Tim, you have noted in your post above starting in 1958, "(8.25:1 for 235)". For 1957 it is, "(8.00:1 for 235)". Any idea what boosted the compression by 0.25? Don't they both have the same 848 head?
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission