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I am pretty sure a cam requires a custom tune- some one will chime in soon- Who did u get the " stage 1" cam from? did they not mention a tuner? Did you ask what all was need for the install??
You'll need a custom tune. Both Hemifever and Greene Racing along with a couple others can write one for you, you'll need to buy a an InTune DCX or a Trinity to download your stock tune and send it to them. And to load the custom tune file they write for you.
I've never cam'd a 4th gen, do they not required pushrods at the same time?