12... you might hit 15 based upon how well it cleans up. (?) The PA Crew would know better.
Throwing out some comps
'65 Coronet up in NY that's not running and needs the East Coast sheet metal treatment lists at $4,500
'66 Polara "project car" that runs drives OK but needs TLC is $3,500
'65 Polara Runs...needs brakes hardtop in PA $6,000
'64 Polara 528 in NJ $55,000
Could go anywhere