slant ignition products
What you are up against........
This stuff is for the most part obsolete
NAPA (Echlin) is somehow linked up with Standard Motor Products which USED to be two of the best quality ignition products in the states. I believe Accel is or was also affiliated with NAPA
BOTH Echlin and Standard have gone downhill AKA Chinseseo.
This seems to be a constantly changing (downhill) quality problem