Cams for pre eagles?

Don't get the generations of the gen 3 mixed up! There is the 03-08 early gen 3, then the 09-present "Eagle" engine. The Eagle engines have the VVT, whereas, the early ones do not. Therefore, the only thing that interchanges are the cylinder heads. The Eagle heads on an early engine, with a 6.1 cam, is a great combo. You can do a 6.4 cam swap in the 09-present Eagle. That is a great combo, too.