Creak/Pop In the Front End of My Swinger

Hi -- I wonder if anybody can listen/watch this creak/popping that is happening when I'm steering my stock 72 Swinger. I'd like some ideas of where to start looking when I get some time to try and diagnose on Sunday.

Here are some facts:

• It's happening at low speeds or stopped in park, particularly when navigating tight spaces.
• I pumped grease into all four ball joints and tie rod ends -- same noise with no change.
• It doesn't seem to be up/down suspension related.
• It seems to be coming from the passenger side.
• The front end was rebuilt with a Kanter (rubber bushings) kit about 20 years (~50k miles) ago. The car sat still for about 10 of those years. Now it's a full on daily driver.