Yes, California.
This site says "OBD II—This more rigorous OBD regulation started to be phased-in in 1994. Since 1996, its implementation has been required on all new gasoline and alternate fuel passenger cars and trucks sold in California. All 1997 and newer diesel fueled passenger cars and trucks are also required to meet OBD II requirements." So the '96 460's sold in CA had to have it, and the way to do that was EEC-V, which used MAF and SEFI.
Most people don't know that any 460's came with it, and Bill has had people tell him he was wrong when he said he has an ECU from one. But they existed. Just like unicorns did.
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