I have found some of the early LR A65 crankshafts.090 shorter or less wide then later crankshafts.
The cases were also cast to suit and can be identified as not having a time plug boss/hole and a very low searial number.
Pretty sure I’m correct however always good to check what you got.
I’m not convinced there is a difference using a ball bearing vrs roller bearing on any of the crankshafts.
I prefer the roller bearing and a solid timing side bushing lined bored and honed.
One other difference in the earlier cranks is the sludge trap has access on both sides.
Good luck and remember “To Measure Is To Know.”