1984 F150 stalls suddenly

1985 ford pickup 300 in-line 6 cyl. starts and runs just fine but when you are going along sometimes it cuts out and dies. when it dies it is hard to start again and if it does start will not stay running long until it cools down and start over. new distributor cap, rotor cap, wires, plugs, ignition module, and rebuilt carb, however i rebuilt the carb myself and cannot guarantee it is perfect.

What is A good site to go to to find a Door lock for A 1986 F150 ?