3.910 + a few lines

I think it is fine. I would spend the time and find a good honing oil - not mineral spirits - and hone the rest of the 8 and call it good. Wash the living crap out of it with Dawn or some other duck friendly soap and check all the oil passages, plugs, etc. Chase all the tapped holes and WD-40 or a similar anti-flash rust chemical that's compatible.