Try a Champion RN9YC or a RC9YC scope up
The R indicates a resistor and the N or C indicates the spark plug body style, N are 13/16 socket size with 3/4 inch reach with a protruded gap and the C plugs are the same accept the body are 5/8 inch socket size scope
If you can get Autolites try either their 3922 or 3924 in the 5/8 body size thumbs twocents

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)