Per the GM Heritage site, 1969 Series C10
Standard equipment CE10 , 307 V8 , 3 speed transmission, rear axle ratio 3.73

Optional equipment - 350 V8 , 4 BBl Carb, 3.07 rear axle ratio, 12" clutch Option LS9 .

Ratio 3.73: available only when 350 engine is ordered....... option H05

Based on this, unless it was ordered with the H05 option, it should have a 3.07 rear axle.

Ron - - Dusty53
1954 Chevy 3604
In the Gallery Forum
"You can't dance with the Devil and then wonder why you're still in Hell."
"They will forget what you've said, and they will forget what you have done but they will never forget the way you made them feel."