Crank and rod bearing journal sizes standard bearings or turn crank?

First, there are four rod journals, and five mains. Twice you have given measurements for only four mains.
Next: if your measurements are good, you have .030+ mains now, and an odd size rod journal, between .020 and .030 under.
The first thing i would do, i would make sure i could find .040 under main bearings. If you cant, that crank is now a lamp stand.
YES, it sounds like it needs grinding. Best advice you got here...take it to a crank shop, and ask.
(And, no offense, i use a digital caliper for some things too, but a micrometer is the proper tool, and each main needs two measurements, and each rod journal needs four.)
Edit: take a look
at the back side of your bearings, they will tell you what size they are. There will be a part# like xxxx-20 or *** .030 (if you use standard bearings on that crank, you might be lucky to get five pounds of oil pressure. But it will turn over easy.)