I just put some ngk tr6s in my Lt1, my question is they were the new v-groove plugs, will this make any difference when running my juice And what about the new iriduim(sp) plugs on thoughts on those?

 

I used to run NGK's until they started to back otu of my heads for no reason. Split in half for no reason. The caps would unscrew after I tighten them. Too many problems... Autolite 104/103 ever since and haven't had a single problem. Going year strong using autolite plugs....