Nacho, the truck's fuse box is not exactly like that. I have to get mine off the underside of the dash anyway, to get to and change the pink wire going to the dome light for the truck's bed. I'll look it over then. Fuse box already has some damage from the heater fuse spot. I've cleaned it up, replaced the fuse holder, and the blower switch, but this is another area I will want to improve on.

Will do on the amp gauge advice. Would brass be a better choice on the nuts for the 2 posts?

Mattax, thanks for the explanation. So it's really NOT so simple as just upping to an 80 or 100 amp alternator?