Google is failing me. So I have a few questions. The fist: Are there vehicle engines that are worth pulling to sell. I am more referring to older vehicles let's say before 1980 and not running and in poor condition and I could just rip them and flip em. I know enough to not scap a 65 impala lol. I am just looking for some general guidelines, what shape do they need to be in, how do you tell if they are rebuildable.