8.5 rear

[Hume]

what second gen's had the 8.5 rear?, which ones had posi?..and what gears did they have? ???

[79 Z28]

72-81 had 8.5" 10 bolt. 70-72 had 8.2" or the 8.5" 10 bolt as an option. 74-81 had 8.5" only. as for posi or not. youd have to check the actual diif, as it was an option, but Z28's all had posi. majority of them are 3.42 rears :)

[Mike K]

Not true, my 81 had 3.42 non posi stock.

[79 Z28]

Not true, my 81 had 3.42 non posi stock.
was it a Z? might have been changed, or is really rare? almost all Z's came with posi ???