I would agree on the holed pistons theory. The carb on that side was probably way lean. No you can't flat tow an early or fc with no engine unless you build a bracket to go in place of the engine to locate the differential. Joel in Keller, TX (DFW area) '66 Corsa w/air '63 Greenbrier 4spd '63 Greenbrier 8dr 4spd "Bob" '63 900 Convertible 4spd '67 Monza 4spd Posi 15 others