Autolite 3924 up
Maybe a Champion RC9YC work
Your way better off running a colder plug than the motors needs versus to hot tsk
If the car sits a lot between uses it may have a fuel quality issue when the gas in the fuel tank gets older than 90 days tsk
if it does sit a lot drain it and use that gas in some other newer vehicle with knock sensors and put new fresh gas in it to help not hurt itself twocents

Last edited by Cab_Burge; 07/08/22 09:23 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)