would this be enough?

That taylor link locked my internet explorer..lol. It sounds like that is the better choice, yes. I wont try to see it again. As was said, smart idea is to wire a direct shot from starter relay to alternator with a heavy gage (6 or 4ga) wire. Rememer, you're asking the same push to move the power over 2-3 times the distance... so you want to make sure it's got plenty of conduit.