There is only one waterpump and it is on the "back" of the engine away from where you would normally find the waterpump.
Make a bet with your mechanic. If there are two waterpumps, you'll pay to replace them both, but if there is only one, he does the job for only the cost of parts.
Use the Mitchell Guide, Alldata, or even the Ford manual as proof.
HTH,
TB
