I can spread apart the lower linkages to 28 inches between the inside edges of the eye-ball joints. At this distance the right lower link (the height adjustable one) swings out more the the left lower link - about 2 inches or so. The spread is limited by the movement of the upper eye-ball joints on the lift links, particularly the left lift link. At the widest position, the sway link for the right lower link is adjusted at maximum elongation.
I have a 43 inch box scraper with the clevis pins facing inwards requiring the lower linkages to be contracted to about 14 inches to allow the pins to be slipped on. My carry-all also has inwards facing pins and requires the lower links to be spread apart by 25 inches to fit properly.
Given that the lower right link spreads out further than the left one, I imagine that the spread distance could be increased by a couple of inches by replacing the non-adjustable left lift link with an adjustable one, the same as the right lift link.