Frank,

Just an added note from Pre '68 Dave's comment. Something else to consider on this topic might be the question "Are the engine/flywheel an original match set?".

My '51 currently still has the original 216 flywheel, but a later '54 235 my grandfather installed back in the early 80's.

When checking/setting timing in my case, I have had to ignore the existing "ball" marker and use my grandfathers added mark to get proper idle and performance.


~ 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)