The answer is no! You cannot put an early left shaft in '55 and later flywheels. The hole in the left flywheel is physically larger and impossible to bolt together. The machined surface is also wrong for end play washers, etc.
the earlier sproket shaft wont work in a later flywheel but if you had to you can use a pinion side wheel for a sproket shaft wheel . tapers are the same on both wheels in early motors but you will have to rebalance it