I have been replacing plugs for 45 years.
I have learned the hard way.
GM use ACDelco plugs.
Ford use Mortercraft plugs.
Cry use mopar/champions plugs.
Sometime bosch and autolight and other plugs will run but Most of the time they will not run right because they do not get the right heat range or the plug is not made for the vechicle specs.
Or in other words use the the right OEM plugs the good book calls for.
And you will have a lot less headaces and grief.
MT
