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Please help me id this rear end

3283 Views 10 Replies 6 Participants Last post by  big gear head
First, the car is a 72 El Camino. It was originally a SS 350 4spd if that matters. When I purchased it a few years ago, I was told it had a Pontiac 12 bolt 3.42 gear in it. That's about as much as I know aside from the following pictures.

It appears to have a C-Clip eliminator kit installed. Possibly bigger axles.
To keep you from having to count I believe they are 31 spline. 1.2326" diameter.

Years ago I bought a disk brake kit and I'm trying to install it. I believe the C-Clip eliminator kit is messing me up. That's another story, I'm just trying to confirm the ID of the rear end and modifications so I can figure out the next step in the rebuild.

I'm not sure if there are other numbers or information you need. Please let me know.

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That's a BOP 12 bolt. The giveaway is the TEN bolts on the ring gear, (Count 'em and see...) Even with the TWELVE bolts on the cover.
They are good pieces. Plenty stout, but not a Chevelle original. Don't let the ten bolt carrier fool you. These are robust 8.5" carriers, not the puny 10 bolts in Chevys.

Don't know about the axles, but they look nice.

These 12/10 bolts were in A body BOP, which is why they fit Chevelles.
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