My brother bought me Bosch Super Plus (plus YTTRIUM) 2 tips for my Charade 87-88 (G100 engine). A mechanic said that they wouldn't work as my car has a point system for my carburetor. Is it true??

The stem (the white part of the plug) is also smaller compared to the regular plug. Are these plugs pre-gapped? Cause i don't see a way to gap.

He bought them since my CNG was not being very economical in terms of milage.