Another Charging Question

Decided to go with a 90 amp 88-89 denso alt. Alternator is order, got some 6ga wire to replace the 10ga I was running, and still need to order a fuse or automotive breaker (not a big fan of fuseable links). Also not sure if I should reinstall the orginal red wire back to the bulk head and hook the factor black wire to the starter relay or leave it hooked to the alt. I've red through many post and seems like everyone has different views.