There used to be a repair kit out there to fix this. I got 2 of em, but also got 2 cars i will keep these kits for just in case. Its a moog problem solver kit. It replaces everything inside that arm on that end at the k frame with a double ball bearing setup, along with a tube spacer, some thrust washers, and i believe a hollow bolt with a grease fitting, a nut, and cotter pin. This kit is no longer made. The boxes mine came in were tattered brown cardboard, looked old, and were falling apart. I think i payed $20 per kit off evilbay about 10 years ago. They are buried on the shelving unit i have full of parts for my 2 builds. Therefore i wont be able to find the part number. The nice thing w these kits is when the arm wears out, you can transfer the kit over to a new arm.
Also moog isnt the brand it used to be. Once their manufacturing moved overseas, their quality went to crap. If your car has headers, it will quickly melt the nylon pieces in your new idler arm. You may be able to make something up with press in sealed bearing race assemblies and spacers, or you may want to look into XRF brand chassis parts. They are a little heard of canadian company that sell only to repair shops, not retail stores, so theres no push from retail chains to make the parts "cheaper". I picked up complete front end joints for both project cars from them, and found a 68-72 idler arm by XRF on closeout at rockauto.com. for $11.20 i needed it for the 69 i have so i bought it. There are a few more left at that closeout price. Read the consumer reviews on XRF parts. They are comparable in cost to moog or ac delco but nuch better made.
