Way of identifying year of a front suspension?

[Budget63]

I bought a complete front 5 lug suspension from a local a few months ago, and the day of bolting it into my truck is approaching. I can't remember what year the guy said it came from. It was bolted into a 60-66 when I first looked at it, so I know it will bolt up. Is there any obvious differences between 71-72 front end, from a 73-87 front end? I looked through the 2B section of the FAQ's, and didn't find it.

Cheers!