I think you will find that the Ian Ross GT350 is limited to only 0.0000007500 squillion RPM (but I digress)...have you spoken to CAMS/other promoters about eligibility profi???
The car isnt a real shelby but came from the shelby batch, so its the closest possible fake. car before it was a shelby and the car after was also.
The only historic category ive talked to is the new american muscle car series
starting in march. i have also been looking at the Improved production road and that looks hopeful
7500rpm is still plenty but our engine is safe 8000 and has seen nearly 9000 by accident but they sound beautiful at revs
Gavin Bullas'es 69 mustang used to see 9000rpm every lap back when it was in groub NC