67-68 K-Member ??? Idler Arm ??

[OldRunner]

I am rebuilding the front suspension on a 68 Coronet Convertible. When I got to replacing the Idler arm, I noticed a difference from old to new. I have figured out the K-Member in the 68 is a 67, do to the Idler arm difference. Is it possible that it came from the factory this way ? or do I figure it has been swapped out at some point . Also is there any other difference I need to know about between the two years of K-Members. Planning a 440 , long shot is a Hemi.

Thanks

 

[Cranky]

IIRC, the 68 up K's went to a double tab mount and the 67 and older had a single tab mount which requires a different idler....