#3 and # 5 have stamps on em but I cant make out whether it is actually a measurement or just random #'s It look likes #3 says .2. (but the dots are at the upper level of the 2) then 0301 (and tR1. Hope that makes sense.

 

Those are just manufacturing date and part codes, it would be very clearly marked if undersized with the main/rod undersize, I'm assuming this motor came from the states? As that's the cardinal rule here so the next guy can order inserts or I'd the crank quickly! Same thing with pistons right on top STD. Or .030 ect... Or you could just put her back together and sell her as a good used motor she's probably got some good stock level miles on her I've seen PMRmotors go 500k+ and you've got internal pics and measurements to go with it! You could get 4500.00 for a motor like that up here with out the documentation that it's sound! Just a thought!