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This is interesting. I remember working on these when I did my class hours at the GM dealership in the mid-late 70's.White were on some GM's, light gray on others mostly late 60's full size and a light blue also maybe around 70 and up but I recall my friends 69 elcamino having a brownish copper color set like these truck ones on e-bay originally.
http://cgi.ebay.com/ebaymotors/1967-...QQcmdZViewItem
Not 100% sure what is correct
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Sweet...the line/valve stem is still on my '72 Sub, and the original paper work & original owner's sales receipt from when he added the "Pleasur-Lift" shocks at 20k miles!