I'm assuming you are leaving the fenders off?
If it has been a while since the car has competed, keep in mind the weight of a legal cage, safety equipment, etc. It will all dictate your center of gravity - possibly to your benefit - or maybe not.
I'll assume you have a rule book. If not, get a rule book.
Regardless of how fast you hope to run, the final determination will be dictated by the class you're running in. You need to build to that current record.
That is a very good looking chop.