Sorry I forgot this yesterday, but here they are:
ID # D9TE-10039-BA is part # D9TZ 10A313-A and it was used on a bunch of the Bullnose trucks with the 300 six from 1980 - 84. You can confirm that it fits your truck at Documentation/Electrical/Alternators and the Part Numbers tab.
ID # D9TE-9B484-BA is part # D9TZ 9B452-B. HOWEVER, that is not an alternator adjusting arm. Instead it is an ARM (EXHAUST AIR SUPPLY PUMP BELT ADJUSTMENT). An alternator adjusting arm would be base part number 10145, not 9B452.
Gary, AKA "Gary fellow":
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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