Quote: The bulletin reads in part: "A new piston will be incorporated into production on the 440 C.I.D. standard engine late in 1971 production.This piston is lighter than the early piston so requires a new crankshaft. Severe engine vibration will result if the early crankshaft or piston is used in these engines. The engines will be identified with the letter "C" on the identification pad on the top, adjacent to the left block and tappet rail as follows:" ....shows engine serial pad with stampings and goes on to list pn's for pistons and crank.
very INTERESTING , for years the mASSES have been drinking Galen's koolaide and saying that the C denoted special crankshaft for 440-6 engines ... NOT
