My Dec 68 (69 model) 396 Camaro has GM on the side. It is a 621.. I would think that the placement of GM would correlate with the 403? I am pretty sure the early April 69 yellow Camaro has its original 403 bell. I’ll have to look for dates on both and report back.
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69 SS/RS 396 M20 X22 Nor 12B,72B,712 bought 1979
FULL OWNER HISTORY
69 Dick Harrell tribute Day II 427 M20 4.10 X11 76 orig pnt, 711
67 Super Stock 302 Camaro re-creation
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