However-----
Today there are some choices in crankshafts/blocks that can be made to vary from the everyday norm and go bigger or littler----Ford cranks are common place with Chevy rod sizes and also even the smaller sbc 2.100 and 2.000 rod journals---Chevy sb can use early 283 main size cranks with a spacer bearing or replacing the caps and using just an upper spacer.

Having said all that---one of the reasons for using the smaller rod sizes is to cut down on the amount of block/cam clearance problems and helps in balancing rotating mass