1966 GTO 421??

[sixtiesmuscle]

Welcome "Bobcat". I only WISH I were too young, and yes, I do recall the Chevy-Olds issue. That still doesn't resolve a question of engines with incorrect VINs being put into cars. Mistakes probably happened, but, there was a post that indicated it was routine to pull engines off the line, and, just go to "the next" one in line. There must have been some precedure to assure that every subsequent car that day didn't receive an engine meant for another car. Maybe you can enlighten us on what they did when an engine was pulled for engineering to test.