Welcome! Glad you joined.
Where's home? I ask because we have a map (Bullnose Forum/Member's Map in the menu) and we can add you with a city/state or zip.
As for the truck, that does sound like a nice find! You'll have to post some pics. And you should start a thread about it in the main section or in Projects, your choice.
You may be a candidate for a 3G alternator upgrade. You can read about that on our page at Documentation/Electrical/3G Conversion. One of the reasons I'd suggest it is because an '86 would have come from the factory with the 2G alternator, aka "firestarter". They had a poor design on the output terminals and those had a tendency to loosen up, which made a poor connection, which caused heat, which made the connection worse, which... You get the picture.
The 3G replaced the 2G later and several of us have upgraded from the 1G, which was used through '85, or the 2G to the later unit. And the 3G will put out more current at idle than a 1 or 2G will at full tilt.
So, since you don't have an alternator I'd suggest buying a 3G and making the conversion. We can talk you through it.
Gary, AKA "Gary fellow":
Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI