12 bolt rearend question

[80stepsideguy]

Question,
did all c10 trucks come with a 12 bolt rearend?The 2.77 rearend i got that was a original rearend to my truck is a 12 bolt.I was just curious on this because i got 3 rearends and 3 different ratios 2.77 a 3.42 and a 3.73.All are 5 lug  and all are truck rearends.Did people get a chance to choose a ratio from the dealership or was that part of the engine package when the truck was built from the factory?

thanks
pat

[Blazin]

You could order ratios, but also a dealer that knew their stuff would have ordered specific ratios for specific truck uses to set on their lot.

[roundedline]

If you were ordering the truck you could option just about anything you wanted including axle ratios.

73-81 came with 12bolts, 82-87(91) came with 10 bolts.  There is nothing significantly better in 12 vs 10 for a street truck.

Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project