[Mr70]

I'd be interested to learn more background on this car Don,because I think it was possible on a very select few.

What plant was it assembled at?
What dealer was it delivered too and on what date?
How long after delivery was it sold to it's 1st owner and for how much?

At least two other LS-6's got a similar ratio on the line that I know of back then.
One being an RPO GV-4 3:36,the other an RPO GV-8 4:11 ratio,both by the ordering dealerships special request.
Both had 3:31/4:10 callouts respectively on their rearend tubes,before the gears were swapped out at the factory it appears.
Both of these Chevelles were found to be "Brass Hat" cars as well,with paper work to back it up.
I've also come across one 1970 L-34 SS Chevelle that looks to have come with a 2:73 ratio,yet to date,has not been substantially proven to be assembly line installed with it.