I pm'd him questions..
Like, does he want to do a water pump with his t-belt? It's driven by the belt, so the labor would be less to do it at the same time. But, the cost of the pump would add nearly 50% to the $$ he spends in parts. Plus, the J motor pump aren't real prone to leakage/failure. Judgement call.
Costs are unique per situation. PM please Boss...