But I knew it could be an issue and "thought" I might have seen the beginning of a crack on the left side of the cross member in my '75.
So, while driving home from work last week, I noticed there was an pull to the left in the steering that wasn't there before.
I got under the car at home with the intent of adjusting my alignment, and found the suspect area I had spotted before had opened up to a crack that was about 3/16" at it's widest point. Yikes!

Got a new cross member from Auto Ricambi and installed it in about five hours in my driveway.
Adjusted the camber/caster and toe. All is well.