I'm lucky, never broke one. The old 451 "B" engine used the cut down 440 crank and LY rods with ARP bolts, and light weight Ross pistons. I figured the rods were the weak point of the short block, but they held up very well in that motor, and a broken intake valve did in the engine after 10+ years of street and strip driving/racing.
When I first built the engine in the 1990's, several friends asked me what I was going to do when a broke one of the LY rods? I would tell them "I'll build a bigger engine."