I spoke too soon on the export being different....I can't confirm that. I was thinking of the "Made in Canada" tag pictured in the Fisher Body books...
I did find a neat picture of a 200KPH export speedo. I thought I saved a pic of the tag also.
What I do find interesting about this tag is the similarity to the 59-64 "second design" tag. Same design of tag,but,the difference being Style and Trim are now ST and TR. In the CBTN book it mentions using this tag on certain Chevrolets thru 66 even though a third and fouth design were introduced in 64.I don't know a thing about 59-64 Chevy's ....Maybe Vern has some insight on the various tag useage early on....
I don't recall codes following the ACC on these 68 tags...Do any of the known 68 Yenkos show a code?
Steve