These are the codes I have for that box from different build sheets in my records. I will check some of the Framingham ones and see if they have anything different.
XC- M20
XG- M20
XD- M21
XF- M21
X1 or XI - M22
take care Andy
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Andy
Team Chevelle #3135
ACES #08305
1969 Chevelle Trim Tag Research (On-going)
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