Sorry, I had gotten you confused with the OP since you were asking about the door sticker and the whole pre-date conversation.

The question had been ask of the OP about if the trans' had numbers in them. The assertion (or maybe his question) is that it is possible that the blocks came no numbers for the factory and not changed later in life. The point of the trans question was that they were stamped at the same time and if they had numbers stamped in them originally then it is highly doubtful the engine didn't get stamped, it is possible but unlikely. If the trans' in the cars in questions are not original then again support powertrain replacements through the years. I think the question of engine assembly date is also a very valid question in that surely even the OP would not consider that a engine being built significantly after the SPD could have come in the car originally. I believe based on common knowledge that the casting date is enough to blow the theory up but the OP doesn't what to believe that and yes I know many commonly held beliefs have been debunked over the years.

Trans numbers and engine build dates would be valuable info in this thread.