Yup, figured out the timing thing. The distributor is fixed, but there is an adjustable potentiometer like you said.
No adjustable cam gears available for a Vigor (or 2.5TL, same engine). Instead of filing the cam gear keyway slot, I'm going to use an offset key. That way I can change the timing and go back to stock if need be.
Tweak, Just to clarify what you wrote, you advanced the cam itself 5 degrees which is 10 degrees of advance compared to the crank angle. Right? Do you have your ignition advanced also? If so, by how much? Thanks!