The factory generator or early alternator in classic C10 trucks is woefully undersized for modern builds with electric fans, stereos, and lighting upgrades. A one-wire high-output alternator is the go-to solution for solving charging system headaches.
This thread covers the self-exciting one-wire design, how to choose the right amperage (65A vs 100A vs 140A), mounting bracket options for SBC engines, and wire gauge for the main charge wire. We also discuss voltage regulators — you don’t need a separate one with a one-wire alt.
The GM 1 Wire Alternator 100A Chrome for SBC C10 is a self-exciting, high-output unit that fits classic C10 trucks with SBC 305/350 engines — one of the most popular upgrades in the classic truck community.
What alternator are you running and how has your charging improved?