[MiraclePieCo]

Are we talking from a width standpoint, installation standpoint, or a performance standpoint?

I had a 4x4 S10 Blazer rear in my '50 PU. It required mini-tubs in the box to run wide tires. Now I have a GM 12-bolt from a '67 Chevelle in my '51. The width is perfect without the need to tub the bed unless you're running real fatties. It's a 2.73 ratio behind a TH350. I live in a mountainous area; the rear was too high geared for my previous 700R4 trans. It constantly hunted gears pulling hills.

I find 8-9" Ford rears are much easier to work on. Easier to pull axles, install seals, etc. because it can all be done from outside without going under the car or breaking open the case. In this case however I wanted my Chevy to be all Chevy.