What spark plugs for 340

jazak5 said
similar set up 10.5

heavy cam/ 3000 stall converter 3.23 sure grip /factory avs carb 91 octane /alcohol free with a bottle of 108 boost every tank

E3 .46 with pertronix converstion excellent throttle response in 2.02 J heads THEY WORK

E3’s lost power in a test my brother ran on a 2 liter Cosworth on the dyno compared to a normal plug. They are junk and a marketing gimmick. Other have shown them to be junk also… But suit yourself…