On one of my Buick 455 engines the crank,pistons, rods and all went throught the pan. Meanwhile the heads and intake blew a big hole in the hood. After that I invested in a tach with a rev limiter, who knew a big block Buick comes appart after 7000 RPM, you live you learn. A chunk of rod was embedded so deep in the track they had to use a chipper hammer and pry bar to remove it.