1985 5m-ge

I Have An 85 Supra Just Had The Motor Swapped By A Toyota Dealership And Im Eating Through Altenators Like Crazy 2 In The Last 2 Months. Both Have Been From Junkyards. Im Also Having Some Other Electrical Problems I.e. The Automatic Door Locks Kinda Do What They Want Sometimes Meaning Ill Be Drivin Down The Road And The Will Just Lock. Also My Headlights Wont Go Down Sometimes And The Lighter If Fully Hooked Up Will Blow A Fuse! Any Suggestions???????????????