hey i would like to know how to spot something decent in a junkyard. namely engines. i'm looking for a 350 olds SB or a 403 olds. I could get either one from a local engine rebuilder( reputible) for about $500-$550(shortblock prices). I was wondering how much those engines would probably run me in a yard and if it would be worth it. also i'd like to know how to spot a good engine. thanks
