I just got a 383 stroker engine off a guy. He told me that it came from a 68 chevelle and that it was an experimental engine. the block and intake both have an "X" stamped on them. i tried to look up the id number on the block(v07o5tyz) but could not find anything.

does anyone have any info on this engine? i would hate to start doing anything to it if it was a very rare engine.