frame twisted or trailer arm?

[davepl]

Yep. On my 12-bolt Camaro ('69) the fact that they used the same axle length but an offset for the pinion actually caused tire clearance issues on that one side only.

So, I bought a wheel with 1/2" more offset (inset?) for that side. Problem solved. Sold original wheel on eBay to help recover the cost.

Then converted to a Currie 9" a couple of years later. So now I have one wheel with 1/2" too much offset. Live and learn. And never sell anything, it seems.

My Currie "Crate 9" came as a box of parts. I had to press on the bearings, pretty much do everything. I have no idea what made it a "Crate" anything. Except the parts came in a crate. And this was from Summit, not craigslist.