Looks like an original tag and distributor, number is correct and so is likely the date for a 1966 production Hemi (34th week of 1966 assembly date). It is also possible that it was in an early 67. Does the 4006 have any other letters stamped after it?

Here's an example of a 70 Hemi Cuda distributor numbers.





Ryan

IBS-P 34 6
that's it.

so, the C is for Chrysler, and the P is for Prestolite?

Yea, as I said before, same number for 1966 & 67, the date code puts it in really late 1966 or really early 1967 production model year territory.

actually, the 34th week ends up the 2nd last week of august '66, so the new '67 model cars were being released in august??

Yea, you're right, August puts it into the 1967 model year, my math was bad on converting the weeks to months. 67 cars would be being built after the first of August