Chosen Solution

Dose motor have to be out to install cam bearings

5.7 & 5.3 no, but i recommend it highly. You could remove the front grill/radiator mount and possibly the bumper depending on clearance. BUT that means, radiator, oil/transmission cooler (if you have those), grill, lights, wire harness, battery removal. You can pry the mount out without removing the quarter panels and wedge it in. Just take care in doing so or you’ll have to hammer out any damage you caused to them. Im not sure about any other engines.