Ebay listing
http://cgi.ebay.com/ebaymotors/Chevrolet-Camaro-ORIG-DZ-302-1969-CHEVROLET-Z-28-CAMARO-CERTIFIED-BY-JERRY-MACNEISCH_W0QQitemZ260137294006QQihZ016QQcategoryZ 6161QQrdZ1QQcmdZViewItem

Inspection sheet list rearend as BO , open gear? I guess you would spec out of posi rear end?

Pretty sure posi was an option. Z28doug has an original pegleg in his car.

Last line under Jerry's comments says it was an unusual option.

Positraction recommended, not required, 1967-69.
It was required in 1970, and included in 1971-74.

Positraction recommended, not required, 1967-69.
It was required in 1970, and included in 1971-74.

How funny. When the cars became dogs posi was required.