Panther F, incorrect....490hp Ford GAA engines were suppied only as of the M-4A3E8 with HVVS. Nearly all Fireflys (Sherman VC) were converted from M-4A4 (Sherman V) with Chrysler multi bank engines..30 cylinders developing 370 NHP. Small amounts were built from other models, but exact numbers are vague. YHR's Firefly is an early M-4A3 with VVSS, so the multi bank would have been there, or possibly the old Whirlwind, in either case the air cleaners would still be at the upper corners of the rear access area. The early M-4A3 hull would not accomodate the larger Ford GAA.