The car: '68 Sedan Deville with Holley Street Avenger carb, dual flowmasters, ignition/wires, edlebrock air filter, B&M shift kit. Primarily used as a weekend hotrod for cruises and general mayhem around Las Vegas.
The problem: I'm looking for a posi diff or whole rear end to swap into this car. I've Googled my brains out with terms like "C-body posi" "14-bolt posi", etc, etc. All I get is truck posi info from 4x4 sites. An Eaton posi is waaaay out of my price range, and I'm pretty sure they don't even make one for this particular 14 bolt rear anyway. Seems there are two 14 bolt units made, the ever available truck/SUV one and my ancient pumpkin. My current burnout situation is embarrassing, resulting in one track from the passenger side tire so I'm assuming I don't have the optional Controlled Differential offered on this year Deville. Headwork, modded intake, cam, headers are in the works, so I'd like to put power to two wheels, ya know?
Can anyone tell me if there is a 70s, 80s, or 90s car that I can find at the salvage yard with a GM posi rear end (and disc brakes if possible!) that will bolt in to the '68 frame? As long as it bolts up to the arms, I can live with gear ratio changes if they're not too sluggish.
Any info my dear gear gurus?
I appreciate any help you guys can provide. If you need numbers from anywhere on my sled to better inform you of what it's equipped with, let me know.
Ryan in Sin City