PA no title car wanting to buy- what to do??

I am thinking of buying a 74 Charger. Problem is- no title. Before I hear all the- run away, don't do it, etc etc- can someone please tell me what is involved? Any sites to go to? Ive heard about a bonded title, affidavit from courthouse, and DMV. The guy gave me the vin number and the fender tag numbers. It all matches so far. Has told me that the police did a vin check and is all clear but I want to check myself.
I have doubts already so forgive me but Im not looking for opinions just help.