Hubs
 

Is there any major differences between the 68 and 69 hubs? Would running the 69 hubs on my 68 be an issue? One of my hubs is bad and I found a matching set of 69s.

none,if we're talking about front brakes

Talking more about the Hight of the hub. After measureing booth hubs the 69 appear to push the wheel out about 1/4 in. I don't know if that is an issue or not or if it matters on my 68

Here is the 68

And here is the 69

The later A-body hubs are about 0.25" taller at the flange and are sometimes found on F-bodies where someone replaced the originals with junkyard parts. I bet your '69 is from an A-body car.

I was told these were original from a 69 with 22000 miles. But you never know.

Some people have speculated that the taller hubs could have been for a heavy duty brake option, but I have never seen evidence of that option existing. It shouldn't be too hard to find a used one, but they are now repopped and some places (Kore3) are making billet replacements.