Thank you for those links. If I understood correctly only difference is mounting hole size, but also Ford produced product would have a scripted 'F' stamped on inner side,
So still searching for confirmation of dimensions. On another forum, the following was provided "Rear x member is 3 1/4 inches; where it is stepped down for the pintle hook it is 3 inches tall. Bumperette is 5 inches tall."
https://forums.g503.com/viewtopic.php?t=223462
So from a parts dealer named Kaiser Willys, found a good top view to measure. If 11 inch width is correct, then the depth comes out to 5.5 inches. If I go with 12 inches, then depth becomes 6 inches. Now just need a confirmation on this..