I HAVE A ? FORD FE MOTOR, MAYBE A 390. IT WAS REMOVED FROM A LATE 60'S EARLY 70'S F 600 DUMP TRUCK, THE FLY WHEEL PART # C4TE6380J. NEED TO KNOW IF THIS FLY WHEEL IS INTERNAL OR ETERNALLY BALANCED.

NOTE : DO THE FORD 600 TRUCKS COME WITH 428'S.