As a caution with any fiber glass body try to get the measurments of a steel body siting on an original frame for measurments. Guys can nitpick any aftermarket body but that is actually not the SCTA's intent. Many would just take the body out of the crating and put in on a frame. That's the start of the problem. Many come pinched in.
You need the measurments so it sits correctly. Doors widths, body widths behind the door, bottom and top, etc need to be in the correct proportion to an actually steel body even if they are not "EXACTY" the same. No one can tell 1/4" by sight but everyone can tell 2".
All the body revels must there and not ground off to "look good" (ask Murray and Alman on that one) and a 29 has lots of them............Good luck