yea...matching numbers like seeing if the right engine is in there, ect...and seein if the vin # is correct...my cuzzo flipped a 72 chevelle ss w/o doin the research on it, and the engine was a 454 but it was suppose to be a 396...and the vin # came up as some old ass station wagon...haha basically he got a chopped velly wit a hyphee engine and a ss emblem slapped on it