Q: cam timing gear replacement on 2000 Mercury Villager

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I purchased this van cheap the previous owner had the timing belt replaced after the distributor locked up but he had problems with it not running correct after that! So I bought it for next to nothing and found that the cam timing gear that drives the distributor has a couple teeth missing & it jumps time occasionally. My question is how costly of a job is it to replace it?
(1) Answer
You will need to replace the camshaft in the front cylinder head. Part will be too expensive from a Dealer. Try finding a used cylinder head at a used parts dealer. Pull the cam from the used head and install (with new bearings) in your cyl head. Repair will be pricy if you can't do it yourself.