After water pump replacement watch for coolant leaks between timing cover and block; a slight air leak there, like anywhere during the "slow" cooling/refill cycle, can mess up cooling systems ability to withdraw coolant from reservoir. ... No difference at the rad.
... Install clamps at "both" ends of hose from rad to reservoir (again, the slight air leak thing can be a real xxxxxxx headache, and waste of $$$).
... If ya live in a cool clime; REVERSE FLUSH heater core "bigtime" (non diesel 2G htr cores are notorious for plugging/piss poor heat, and 195* stat. Otherwise many like 180
... So what hood/fenders are on that 96???