One other comment on new parts in general:
The user needs to be as knowledgeable as possible to minimize getting something that is not what he/she thinks he/she is getting.
An example:
Rochester made some really wonderful carburetors called quadrajets. In 1967, these carburetors were identified by tag only. As many of the tags are missing, or the different colors have faded to aluminum color, those doing numbers-matching showcars want to replace the tags.
There were 18 different quadrajets for Pontiac in 1967. Each tag has a different number, and each tag is also a different color (the different colors aided in engine assembly). Additionally, beginning in 1966, California introduced smog emissions. So the California tags have a square hole in the center, and the Federal tags have a round hole in the center. If you check ebay, you will find many DIFFERENT numbered reproduction tags, ALL maroon in color with a square hole (the California 400 S/T GTO used a maroon tag with a square hole). The other 17 new reproduction tags are just plain wrong.
So the knowledgeable hobbyist is not going to buy, and others are going to learn when they show their car, and lose points.
Hard way to learn.
Jon.
