When did GM start stamping VINs on the engine blocks? I was under the impression it was '69 only. Yesterday I came across this block in my barn: T0922RZ 18W101706 RZ would seem to be a '68 block code (140, AIR, PG) but I was surprised to see the VIN on it. Dave -------------------------------------- Dave Leonard Office: 908-281-7547 Mobile: 908-612-7499