Looking for factory rear ratios and the options the vehicle has. Particularly interested in 1st & 2nd gen info. It is my observation that vehicles equipped with a 283, 2bbl, PG, and factory AC will have a 3.36 ratio whereas a 283, 2bl, no AC will have a 3.08. Only interested in original equipment setup, not aftermarket installs. I am wondering if my theory is correct and a descent census may be the only way I can semi prove it.