Compared to WHICH new rod? There hasn't been a 340 rod made in a long time.
I wouldn't get real caught up in weight. I think it's a waste of time for all but the most raciest of builds. I think a lot of folks make much ado about nothing there. I cannot count the number of badass small blocks I've seen at the track that had nothing but the stock rods......and a lot weren't even balanced. ...and I'm talkin about stock eliminator record breakers. Not backyard builds.
Then by stark comparison, I've seen some of the most cried over, high dollar Nth degree builds blow slap the FARK up on the first run.
IMO, as long as everything is balanced as an assembly, it's probably ok. But as I said, if you change that one rod............
