I've had 2 engines come apart. Both times it was a rod bolt breaking. Ist time was in 1971 on a Plymouth 383. There were no aftermarket bolts at that time as far as I remember. The 2nd was an ARP2000 bolt and I went to the L19 after that one. Make sure to keep the L19 in oil until you install it. Exposure to hydrogen will cause it to lose some of it's strength properties. Once it is in the engine it will keep an oil coating to protect it.
http://www.jrmotorsports.com/product.cfm?InvKey=11732
http://www.centuryperformance.com/ar...e-spg-187.html