Magnum 360 rebuild help

My situation is that I purchased a 360 magnum with 70,000 miles on it. I really want to get the car on the road but wondered how far do I need to rebuild the motor to make it reliable. I am planning on running carburetor but feel that if I start by changing the cam it becomes a slippery slope. I would appreciate what advice my fellow a body brothers have.
Wondered also which water pump would work well? I don’t want Chinese stuff and the magnum is going in a 65 barracuda. Thought there might be an issue with the direction the pump might angle at?