- 2000 Windstar SEL 3.8 V6 Replace Intake Manifold Gaskets?

I was told buy the Ford dealer, (paid for the diagnosis) that I needed to replace the upper intake and crossover pipe in the cooling system. How hard is the job and what parts will I need. The mechanic told me it was an easy job just very time consuming and that was why I was quoted $975.00 not in the budget, I'm on SS.