Wanted an nos or mint used AC a366 air filter.Not the new ac delco .Must be old.thanks John call 9063373928 or email lt5zr1@ymail.com.

 

Could you educate us on the difference so we know what to look for?
Thanks

 

than this pair of 366's , that I have . The square mesh is much more in demand and is probably what he is after and not this second generation diamond pattern that is seen still on many of the filters made today ..

these are mid/late 70's produced ?? AC filters ... just before bar codes .....

Scott

 

Thanks for sharing the photos. I was aware of some filters being square mesh prior to 1970, perhaps that is consistent across all of the AC Delco product (would make sense). He didn't say for what year he wanted the A366. I believe the diamond construction also changed. I'll have to compare what I have from just a few years ago to your photos to learn more there.