That listing is way too general as that reservoir is not correct for 1985 or '86 trucks, nor for any year diesel. The diesels take a very different reservoir and in '85 the gas engines changed to a reservoir with a connection in the bottom instead of a hose draped in via a slot at the top.
The difference is significant as the 1980 - 84 gas reservoirs take a different bracket than the 85/86 reservoirs. And the one in the listing doesn't appear to come with the bracket. So if someone wants the older-style reservoir to put in a later truck they'll have to modify the bracket.
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