pre-1993 Touring car championship

[muhuha]

Does anyone on here compare in the pre-1993 touring car championship. I've got a 1989 200sx s13, with i'm looking to enter. By the looks of it reading the regulations a turboed car is allowed to entry provided it was fitted during manufacturing. Can you tell me how competitive the series is, looking to race it somewhere somehow, no matter if it'd be a struggle to win.

Just out of curiosity, say i want to enter it in the britcar or british touring car (not that i have the money to) would it be allowed, with it being so old. Not too clued up on the rules.

Thanks