[Roadsters] Not stock 2000, how to tell what year it really is?

[klc]

Hello all,
I have had a 2000 sitting for years!
got it from a family member and just don't have the time to get it 
running again.
It's not stock, flared fenders, big carbs, electric fuel pump and fan. 
Big front air dam, ported head,
Steal braided lines to oil cooler and such.
boxes of spare parts. Before I put it on Craig's list I need to know 
what year it is, pink
slip says 69, seems older. Mirror on top, cant find plate saying mfg 
date. How do you really tell?
don't even know what its worth not being stock and all!!!
Previous owner parked it after out running cop. been sitting since 89, 
before I got it, engine was started
but front brakes were stuck on rotors and calipers were removed to roll 
it on trailer! body's strait!
Help!!