Three original Firestones for my 1973 Z/28 have 043 codes.
My car was built 02A so a 4th week of week '73 tire for a 1st week of Feb car seems to line up pretty good...
I toasted and tossed my two rear tires in the 90's so I have no idea what codes were on them...
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Charlie (aka: hubleyman)
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