Headlight / engine wiring issues

All the engine work was done by the previous owner, I'll probably just get a new harness. Will it have the same pin connectors that connect to the back of the engine bay? Because the rest of the wiring in the car is great.
If you buy the harness made for your year and model car, it should drop right in. I bought one for a 70 Dart one time - perfect fit on all the lengths of wires, the connnectors and the bulkhead connector.