Indy X heads J&E SRP Sportsman Class racing pistons, Dish. I think I will go with Champion or Autolite.What type of heads?Pistons?
oh ok I have a pack of Un opend plugs from early 70's lolStock 68 340's with 10 1/2 to 1 pistons ran N9Y Champions. I think they go by #405 now.
The engine builder said he would take care of it.