Sprint car motors?
Still remnants of Craftsman truck series engines around too. I stumbled on to this one a couple years back. A dry lake bed racer changed directions. Had two engines, numerous cranks and cams, few sets of heads and two complete engines. The "used" engine he sold for $4500.... and I picked this one up with 7 dyno pulls on it for not much more. Think I saw it's twin for sale on racingjunk awhile back as it did go to Montana.