What more info would you need? You inspect them and make sure the part numbers jive. I've run multiple used cams just fine in cars I've used. Yes you need a dyno tune, I mentioned that in another thread, they generally run $600 for a good custom tune.
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.