Can I move an imported camera track in Maya without manually changing 500+ keyframes?
Select your camera, locators (if exported), and anything else from Nuke. Group them all together with ctrl+g and modify that group as a whole.

You can scale uniformly (but not independent axes), rotate, and translate.

Often one trick is to snap the pivot point of the group to a specific reference point (hold down d and v then drag to the reference point, and then snap the group to the corresponding point in your scene (just hold v while dragging). Then rotate and scale to align the rest of the group.

When finished, you can simply unparent anything not animated with shift+p, but animated objects like your camera will need to be baked:

To bake the camera, duplicate it, unparent it, then parent-constrain it to the camera (Animation menu > Constrain > Parent Constraint). Then bake the keyframes (Edit > Keys > Bake Simulation) and you can then delete the constraint and the original camera.