Birddog,
Your thread title mentions 'storage' brackets. As others have mentioned, the 3A had no provisions for storing the top bows on the Willys. This is one fairly quick way to determine if the tub is a 3A or a 2A.
Two other ways to determine a 2A vs 3A tub...
Wheel house length on a 2A...34ish inches. 3A...32ish inches.
Ignition switch position on a 2A...Way over toward the center of the dash. 3A...up and to the right of the steering wheel tube shaft.
Hope this helps.
Tim