Khali,
A few years back someone lobbied SCCA to get Cobra replicas into BSP. This was the approved class for a while. It is appropriate and you run with Corvettes and 240Z Datsuns. I have been signing up and running in "B" street Prepared without a problem here in LA.
The modified classes here are hopeless. Those cars are purpose built for Solo II and cannot be driven on the street. My Arntz never would have won a Divisional Championship event in that class.
Paul