are you using the engine mounted jack shaft plate or the jack shaft plate that mounts behind the engine on the frame?
I don't have either handy, but trying to help you describe which style you are looking for incase someone has one.
Also, you may or may not know, the TAV is nothing special, any new TAV30 with a 1" Driver and 5/8" driven set will work with the super bronc. However you will need to measure centers between pulleys and order a different belt.