Thank you in advance, Would you be able to identify the pictured differential? It is out of a 1970 Buick Electra 225 Custom. It has; 10 bolt cover 12 ring gear bolts with 3/4 in heads 2.56 gears (41-16) The idea is that I am looking to put in a limited slip. Thanks and have a good one.
That would be the 66-70 9 3/8 Big Car Rear. No new posi, or gears sets are made for that rear. NOS or used parts. More info in this thread, https://www.v8buick.com/index.php?threads/9-3-8-rear-differences.71740/
Thanka you. Yeah that's what I thought. Dang; I was hoping to have to avoid an axle swap just to get posi. Well since I have to change out the axle I might as well make it worth my while (heads, cam, intake manifold, headers, EFI, Electronic Ignition) and while i'm in there re-gear to a low 3 to keep the streetability
In addition to the engine rebuild to make the rear-end swap worth your while, you may want to consider a new torque converter. With overdrive, whether through a new transmission or Gear Vendors, you could probably re-gear the diff to mid or high 3s