It's a 92 or 93 460 with multiport, TFI with distributor, EEC-IV in an F53 chassis. Fortunately, it's a class A motorhome, so nobody knows it's a Ford unless they look at the steering wheel. The thing runs great and it's so quiet at idle I can pull the dog-house cover and hear only the slight ticking of the injectors (it probably helps that the tailpipe is 20ft behind me). I am adding gauges - Tach, Vac, A/F and trans temp. I'm hoping to get 8MPG by keeping an eye on the Vac. It will probably help if I travel with empty tanks. Holds 25 lbs LPG, 55 gal gas, 100 gal fresh water, 45 gal grey and 45 gal black. That's up to an extra ton!