stock 340/360 rods when resized properly w/arp bolts, 'and that have not been resized to death' [numerous times] are just fine.
I've buzzed stock 1970 340 rods well over 7000rpm and have a good friend who used to run them in his circle track car in the late 80's early 90's w/sps bolts whippin up to 8000 rpm and even touching 9k!!!