LCA IS THIS NORMAL

Well, i'm not Jim Lusk, who i do know, but another Jim, Jim Valuckas.
I personally have never seen a side of an LCA, with that big of a larger diameter than the other side.
But that side is most likely a bit bigger.
I wouldn't worry about it at all.
I think it's just the way that one was stamped out, back in the day, at whatever manufacturing factory did the work.

I currently have a pair of LCA's for sale in the for sale section on this forum.
Look at them for picture reference.