On the RX-7, yea moving it to B has it's hurdles, AND it's different than ALL other IT cars as it's the ONLY IT car that, in pure IT prep, has it's own class available to it over 75% of the country, IT7.

And IT7 is pretty popular in many places, and in some cases out numbers (ed) ITA cars at the same event.

So, does it really make sense to move a car to a new class, require it to be recaged, require the drivers to sell the wheels and buy new, AND tires (I have 3 sets min)?
Then there's the problem of the process. Guess what, the ITAC will recalculate the numbers for ITB, so a car that, when you look at the top IT7 drivers in the country, barely (if at all) beats ITB cars, will have weight added.
A process that has rendered it uncompetitive in A will, in all logic, do the same in ITB.

So, with all that, what's the point?
It's better off as is.