I would try to find out what is heating the fuse link. You could un-plug the regulator and alternator and anything else on the circuit. As far as no fire there are a lot of possibilities. The one thing to be sure of is the ballast resistor connectors. They are indexed so you have to be sure the plugs and the wire orientation are correct. Through the years I have seen the plugs installed wrong due to the index pins being melted off. Simple item to check.