My God, I love the Ralleys!! Why would you want to change them and oh the car is awesome! You really scored a dandy there, your going to really enjoy that car when your done.
What are your plans for the drive train?
It's a 318. Not sure on it's condition. If the motor checks out I'll stay with it. I have a 273 ready to go on the engine stand if needed. We wiol be dropping the motor and trans along with the suspension out the bottom. That way I can freshen up the suspension and get the 318 on a engine stand for basics such as gaskets, timing chain, maybe an E-4 Isky solid cam and one of my D4B's. We will also be painting the engine compartment.