904 torque converter dont fit..?

RedFish said
A machine shop could change the end of the crank but doing this with the crank in the engine and under the car would be very difficult. First finding the appropriate cutter then setting it up to cut on center...
time consuming if not else.

but the outer hub is small too, hence the use of different flywheels from early to late.fwiw

so you'd have a very this ring left if you tried opening it up.