1984 - 86, but it looks like it only fits some 1984's as there were two different shafts. That's confusing as the 1983 460's and IDI's came with hydraulic clutches, so I don't think the MPC is correct. I believe E4TZ 7506-A is the hydraulic clutch shaft and it also fits the 1983 460's and IDI's.
80/84 F 100/350,U150 All EOTZ 7506-A //undercut both ends 1
84/86 F 150/350,U150
E4TZ 7506-A //undercut one end, knurled other
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