Whats the value or is it worth it.

I have a 68 Barracuda Formula S, 340, auto. The car is rust free and uncut. It has been drag raced for the past 20 years or more. I still drag race it. I am now contemplating installing a rollbar and subframe connectors. My reasons are I dont feel it has anymore value or worth than a regular barracuda as it is missing its data plate no build sheet and I dont think its the original engine. I was interested in building a F.A.S.T. car out of it but this is california and there isint any interest in that out here.