Issues with pre - 70's 318 in a 73 Duster

The basics you need are rad, alternator brackets, timing cover, water pump. I don't remember if some of the water pump/ timing cover bolts are different lengths, but that is easy. You will need matching late model pulleys. I THINK you can use your old balancer, but you WILL have to make a new timing mark. This is easy, use a piston stop. I've posted many times how to use one. Properly done, they are accurate.

You COULD cheat and use a couple of rad hoses coupled together with a sleeve, I did this for awhile until I changed radiators.