I had a one time friend that worked at Honeywell, they make spark plugs--I think maybe some for the AC delco brand....not sure exactly.

His expertise advised that NGK and Denso made the best plugs, it's all I'll ever own for my Honda...or any import.

I had Bosche Platinums in my old Dart, those things sucked...they wouldn't last long at all compared to even POS Autolite plugs.