take a look at the saddles from under the truck looking outward.. if the outer ring of the saddle is close to the inner ring on the trunnion bar,,, it is worn out.. How about you get a few pic's of the inside of the saddle, and trunnion bar in the A-Frame..
Many years ago, I used to put a magnetic dial indicator on the trunnion bar, and the pointer on the bottom of the saddle, 'Zero' the dial, then jack up on the trunnion bar (while watching the dial the whole time) till the wheels just came off the ground. then take that reading.. at,, .100'', we would call it ''worn''... when it was apart, the brass bushing would be paper thin on the bottom or close to it.. and certainly the bottom of the trunnion bar was worn,,, (D-Shaped)... jojo