Wide:
So didn't think to ask for accuracy needed. So did a caliper measurment if you need closer I will need more time.
So measuring outside bore to outside bore it showed about 10.815 with the bores being 5.250 + At 5.250 the caliper was a little loose so thus the plus say 2505. Might explain the .815. Sooooooooo this maths 5.565 Cl to Cl. Logic dictates nominal is 5.562 (9/16)
Didn't measure land between bores it was cold in a hurry. Would have helped conform the 5 9/16.
Is that a help? My 12 inch wasn't enough to get out side of casting boss's it was shy by like 3/8 's.
Let me know
Luke