A suggestion........ make sure you install a new or rebuilt quality water pump including the pulley....... too much trouble doing the same job twice.
Can we see some photos of the engine compartment.... both sides of the engine and whether the nose has been modified so you can install your newly acquired radiator.... make sure it is tested for 5 to 6 pounds of pressure not any more....... as your system is really running at O pressure but it helps to detect leaks and to run an overflow tank later.
