If you’re running that radiator, I can give you all the pulleys and brackets from a 69 318 I have here that came out of a Cuda. Are you running power steering or manual? That will make a difference in the crank pulley.
Would you have an extra timing tab??? If he's running the 70 and later timing chain cover, then he can just put the cast iron water pump on it and install a timing tab to get a reference for his TDC... Then he can find TDC and make a paint mark on the harmonic balancer to line up with TDC on the timing tab so the lower radiator hose won't block the timing mark....
That would save him from having to change the timing chain cover and having the little gasket ends on the oil pan... It would be much cleaner...