Will a 1983 350 sbc flywheel work on 1973 400 sbc?
Yes, a 1983 350 SBC flywheel will work on a 1973 400 SBC. The bolt patterns and dimensions of the two flywheels are the same, so they are interchangeable. However, there may be some differences in the weight of the two flywheels, which may affect the balance of the engine. If you are concerned about this, you may want to consult with an automotive expert to determine if any additional balancing is necessary.