I run 94 octane in my 408(410)(.040 over pistons),timing is at 38*.I have my cam degreed at 108 it,s a custom grind with .631 lift,eddy heads.Dizzy is locked out.Never get pinging at WOT.Maybe try alittle more advance as 34 seems low for such a high compression engine.JMO.:cheers:
