??? Spark plugs for Dart heads???

[Doug Chahoy]

I'm in the process of my engine swap. Put in a strong 383 with Dart heads. Realized they require a longer spark plug.
Does anyone know what part # I need instead of going crazier with the idiot parts counter people. I just went through one experience yesterday over a universal inline electric fuel pump , that I will try my damndest to forget.

 

[pontiacgp]

what Dart head are you running? These are all NGK but with their numbers you can find an alternative brand if you want...


http://dartheads.com/wp-content/uploads/2016/04/Dart-Spark-Plug-Application-Sheet.pdf