Inliners International Forums General Discussion Engines Flywheel bolts for a 230 ind. Chrysler flathead 6

I am have a very hard time finding the flywheel bolts for this engine they have a round head with a flat spot they are fine thread with a nut. They go through the flywheel and then crankshaft then the nut goes the flat sided head locks itself inside the flywheel where it will not turn. Thanks for the help