Front sway bar diameter

[1967GMCC20]

Originally Posted by A1971Blazer

I have a spare sway bar that was on my '67 c10 when I bought it. It was on the SPID so I'm sure it was factory.
I just went to the garage and measured it. It measures 1-1/16" diameter and has the brackets that bolt directly to the lower A-arms, no links like the aftermarket ones.

Do you know if it bolts up to a C20. 2wd. Or do I need the 1-1/4in.
I wonder if angle from frame to A Frame is different?