FST vs FV vs IT....
If the FST class is in the same run group as FV/FF/F500 in your region how does it impact you? Why would an IT racer care if the FST class grows or not.
Frankly, there is a core group of folks who know a lot about FV, who have had their eye on the trends in that class and are planing for the "evolution" of the class. That was a pun---"evolution" is a FST chassis make. This FST will let those with the desire to evolve without allienating those who wish to remain in FV to their dying day.
In a nutshell, FST is a class with the performance potential somewhere between FV and FST. While the class allows for conversions with many similar parts, I don't think FV conversions will remain competitive as the FST class grows. It is essential to allow conversion cars to compete/participate in order to grow the class.
Think FV with wider tires (no more 4.5" wheels), disk brakes (instead of drums), rack and pinion steering (instead of the old steering box), restricted 1600 (instead of a 1200--parts availability) the 1200 hasn't been produced in more than 40 years.
I recently sold my FV because I wanted something different. I am building a FProd car and strongly considered FST--however, I didn't because a) I have absolutely zero desire to race with SCCA and

I don't have much desire to race in a class of 3--that is a catch22 because the class won't grow as long as people like me are waiting on the sidelines to see if it grows.
Back to your regularly scheduled programming.