Some time ago I took the control arms off my 1985 silverado to replace the bushings. Now I can't remember if the "collar" goes up against the front bushing or the rear.

I have spent hours searching the web and joined Chevy truck forums trying to find the answer to no avail. Maybe someone here can help. I'm attaching pix.

 

This might help.

https://www.rockauto.com/en/catalog/...trol+arm,10401

 

Nice try "Old Chevy", It seems that there are different styles with mine being the oddball. I did not see anything definitive but I'll look again when I have more time.
Thanks!

 

Might give eBay a try. They have lots of automotive things for sale there, some new, and some used.