I am going to go look at a 12 bolt rear end out of a early 70s el camino, i would like to know the gears posi etc... Does anyone have a vin for this? Thanks.

VIN stands for Vehicle Identification Number...for the car, not just parts.

I think what you're looking for are the suffix codes (http://www.chevellestuff.com/generic/axlecodes.htm) for various years and ratios. Check the link. graemlins/thumbsup.gif