I think all the delco voyager is is a GM module that has the limp home advance curve closest to a real marine adv curve. Cuz if they were to spend even 5 minutes of r&d time designing an advance curve, it would be way better than the voyager's setup.

performer RPM air gap, 750 dp or quickfuel 750, HEI with vac advanced eliminated, and a fuel pump or regulator to get you to 7 psi, and yes you get a very reliable package