Nice GTV6 prepped for track day and time trials. A photo of engine bay and drivers seat, fire suppression, fuel cell might help get a better idea of race prep.
But offhand, I would say from quick evaluation of the small amount of photos may $8k-$12k? Looks pretty rust free which is always a big consideration.
I'm assuming the lights work all around, horn works. Should be easy to register in the appropriate states. I live in Reno and "street legal" means, you have car insurance, clear title, VIN checks out, and paid your annual registration.
'76 Alfetta GT, 2013 Fiat 500 Abarth, '78 sports sedan (2 of them) - sold, '91 164L - sold, '83 GTV6 -sold, '87 Milano Verde - sold, '91 spider -sold, '69 MGB GT,