I wouldn't go racing with that crank, but if it's round and doesn't have any deep scores, it will last a long time in a street machine. Grooves or shallow pits don't damage bearings- - - -high spots or debris do that. A groove is just an oil reservoir. If that's a standard diameter journal that's round but a bit undersize, a .001 or .002 undersize bearing will get the oil clearance back where it needs to be with just a good polish job and a thorough cleanup. Measure the crank with an accurate micrometer- - - -"Test, Not Guess!" I've done that dozens of times.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!