Installing a cam on these engines are not terribly difficult from what I have read, hardest thing is taking out the radiator and tipping the AC condenser up in the air. But certainly not something for a novice.
If you have replaced head gaskets or done engine work before you should be able to do this no sweat. Otherwise I would leave it to the pros, unless you are mechanically inclined and have a friend to help you who has done similar work before.
Ken
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