Mike, Just a suggestion but give those number a good scrub with a wire brush before you retake your picture. The casting# 591953 was used as the main case for 1948-63 according to a quick search of GMPartswiki.


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)