I recently noticed that my left rear wheel is about 5/8 inches closer (front to back) to the front of the fender than the right side. I read several people have ride right differences from one side to the other but my ride height is even, just the centering of the wheel is little off. The axle is centered on both springs so it appears to be a body alignment problem. Is this unusual or part of 1967 factory tolerances.

I think you answered your question with your other post... http://www.camaros.net/forums/showthread.php?t=166215 Your rear axle will shift in the perches because the alignment shims don't let the pin seat in it's alignment hole in the perch.

You guys are on the right track. Have also seen cars that have had a quarter replaced and the wheel opening was not centered well.

But the perches are centered now, i'm wondering what will happen later. I think I read somewhere that single leaf perches didn't have alignment holes? So what keeps them from moving?

Mark the mono-leaf's I have seen had an offset hole in the perch and a nub on the spring that fit into the hole.

I have to ask how you know the perches and axle tubes are square and lined up? It's possible your quarter panel is 5/8" off but you would have a really twisted body and you would be able to see it in the trunk fit and at the doors.

If you want to test this pull the shims and bolt the rear end up with the pin in the hole and see if you still have the problem.

Get out the tape measure. I like to measure from the front leaf spring pocket tab to the rear end housing. Make sure you are measuring to the same spots. That will tell you if you're square to your frame atleast.

Get out the tape measure. I like to measure from the front leaf spring pocket tab to the rear end housing. Make sure you are measuring to the same spots. That will tell you if you're square to your frame atleast.

Just measured and found 1/4" diference.

If you want to test this pull the shims and bolt the rear end up with the pin in the hole and see if you still have the problem.

Thats how I got the 5/8" measurement.

I thought it would be simpler to use two post to seperate out my questions. Perhaps I should just have lumped both questions into one post.

That's more than I would want personally. I'm not sure what the tolerance was from the factory. Doubt it was quite that much but who knows. That's the beauty of a 4 link. I was able to dial mine into 1/32. You should measure it at ride height as well.