I’m preparing to drop in a Starion 75-amp alternator in place of the 50-amp unit in my ’87 4-cyl. However, I’ve been looking at the charging wire running from the alternator, and it’s a pitiful thing; I haven’t measured the conductor to be sure, but it looks like no more than a 10-gauge wire.

Looking at wiring charts, it tells me that a 5-foot run (which is about what it is from the alt to the battery) at 75-amps requires a 4-gauge wire. That’s a big difference from what’s in there!

Should I upgrade that stock wire before putting the new alternator in?

1987 Montero SWB, 2.6L, 5spd
Weber conversion
2-valve head from Engine Machine Service
"4G54 FTW!"