Hello, im trying to get rid of the bog in my 426..was going too do the o-ring mod..Do i have to fiddle wit hthe acc. pump timing screw? i was playing with it and pressed all the way in the duration is 3/4 ish of a second...where it was stock its about 3.5... hardware stores are closed so ill have to go tomarrow, but will the O ring with the stock position on the timming be right? Kind of confused. Any help would be great! thanks.