I own 3074 and it has the non-louvred hood.
The speculation on the why and where is probably as accurate as anything but in addition there was a design decision made for the '68, certainly during '67 production, which incorporated the louvres for all '68sand I would think that just putting louvered hoods on the last 100 or so '67s also is in some strange way was a engineering test or verification that it was going to be ok for the '68s?
Your statement seems to imply that "all' of the last 100 or so got the louvered hoods . Whether that was your intention or not I wanted to clarify that my statement was meant to imply that during the last 100 or so cars louvered hoods could have intermittently been installed .
I'm not implying anything of the sort. However, I have found that sometimes making an inaccurate statement, even unintentionally, will have the effect of having those who know but were not motivated to speak, get a fire lit under them. So in the end, many benefit.
The needs of the many out number the needs of the few...or the one? V
I would not consider 46 hoods, "only a few". That's a significant number to me.
So Dave, you are saying that you have information that shows that 46 of the last 69 hoods installed were louvered?