My Flex plate has broke. It galled the mating surface of the thick spacer between the end of the crank and the torque converter. I am looking for a replacement part. Can file on mine but would prefer using a better one.
The idi is loosely based on the IHC 266,394,345 and 392. Those also have only 9 bolts with an empty spotYou must have miscounted your bolts. IDIs have nine while the PSDs have ten. There is ten holes in some of the IDI flywheels/flexplates. Some of the earlier 6.9s had a small dowel in the crankshaft in the circle of flywheel bolts.