stock 340 rods
It wasn't the rods, it was balancing, or heavy azz pistions, or clearancing in general.
Yeah, I blew up three stock rodded motors, always due to something else, even though the rods were busted in half. Them were some expensive lessons.
1) Big old heavy TRW pistons, with too much cylinder wall friction, and I aint telling why. (ok, I was having trouble seating the plasma rings, so I did the old babo trick.) Bad idea!
2) Oil restrictor plug added to passage before I got the block, didn't see it, and it starved the motor at rpm.
3) Hydrauliced my alcohol injected flying toilet 440 in the 67 R/T
Like others have said, less is better, get the lightest piston hanging on the end you can afford.