How to obtain a title

New to this forum and would like to know how to get a title for a 68' barracuda fastback. The guy i'm buying the car from does'nt have a title for the car and does not know where or who the last owner is/was. I cleared the vin through the local sheriffs dept and it is not reported stolen. Looks like the car has not been registered in a long time. Any help would be great. Thanks, Joe