determine which idler arm I have

The suspension on my '67 Barracuda was modified by a previous owner, and I have no records for what was installed. My idler arm is worn out. I discovered on this site it does not use the original '67 idler arm because mine has a through-bolt to attach to the frame tabs. I thought it would be the '68+ setup so I bought a Moog K7042 idler, but that one drops farther and the tapered shaft protrudes upward while mine needs to protrude downward. Since the tapered shaft is tapered, I assume it can only insert into the center link shaft in one direction? Photo attached of the bad idler arm still installed. I'm trying to find out which idler arm I need and/or which front suspension I now have. Looks like "maybe" I could try Moog K7066 for 73-79 charger, or K7086 or K7014 just based on pictures. Thanks.

present idler arm.jpg