On mine I went with an Edelbrock 43662 Pro-Flo Round Air Cleaner 14" Diameter base, and replaced the 3" element with a 2" element 14" x 2" 14x2 Washable Reusable High Flow Air Filter Element Chevy Ford Mopar V8. I even have a 1" air cleaner spacer between the FiTech and base of the air cleaner and I've got 3/4" of hood clearance.
US NAVY VET - 65 Custom Fastback GT-A-code. FiTech EFI w/Tanks Inc. w/Aero 340 LPH pump, TCP Power R&P; Full front coil over conversion w/1" Shelby drop; TMI Sport R custom interior; T5 TKO, Speed Hut custom speedo; Autometer Phantom gauges; SSBC Force 10 -13" disc brakes w/10.5" rear disc brakes; 24" Griffin Radiator w/twin 11" 2800 CFM fans; Classic Auto Air AC; Truck-Lite 7" LED headlights; Mustang Project Shelby LED sequential taillights. 2001 Bullitt rims w/Nitto NT555 235x45x17 tires.