1990 Toyota Pickup alternator out

The alt brushes are worn out. While waiting for new alt, drove the p/u for a couple days and used batt charger to recharge batt when at destinations. On 3rd day the p/u started chugging along like it was hitting on 2 or 3 cyl then stopped after about a mile. The batt still had lots of charge, but when restart was attempted, the starter would only click. Turned on lights and tried to stat, the starter clicked and lights dimmed slightly but stayed quite bright.

ecreek