W 2 econo's on a 405 " iron block. 9.55 @ 145 with a glide and 2800# car in 04. Block was wore out with 350 passes and no room to even hone it. I was actually trying to see if it would run fast or expire. Won me lots of money,just had to retire the setup. Still have a 395 in stock/hardblock and these old heads as a backup. Wish they still made them. Much cheaper than what I win less money with now.