[Mr70]

Charley
Based on what I can see in your picures,it looks like a 1965 Impala.

That dent shows up on the 1970 Dual snorkel also,and is intended for the PCV.But the duals dent does not come that close to PCV to hinder it.
I think it was provisional?

There is a company called NKR Products c/o Nelson Rudsill,PO box 495,Rutherford College, N.C. 28671.Phone#828-874-2335.
They are reproducing these Cowl Plenum air cleaners for the early Chevrolet Cars.
In the April 2000 issue of the now defunct NCOA Chevelle Report,Mark Meekins wrote a GREAT 7 page 28 picture article about these.He shows all the details and differences between the Remanufactured,and the NOS ones.
It is great reading with all your questions answered.
Incidentally,I have seen these remanufactured ones sell on Ebay recently,but being advertised as NOS..

[Edited by mr70 (03-18-2002 at 02:17 PM).]