For reference, below is a screenshot of a for sale NOS GM# 3741822 flange. No single wide spline for indexing evident. Would be just too easy - lol! (eye rolling emoji goes here)
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Last edited by Gdads51; 07/28/2026 1:40 PM. Reason: fix picture

~ 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)