the front one is not keyed its a spacer about.290 thick.do you have that piece.you just put it over the end of the cam its larger than the cam and you keep it centered while you tighten the bolt with the washer.maybe someone can put a picture of the whole thing on here.do you happen to have a shop manuel
i mailed you the front spacer 6291 today.i dont know if you still needed it or not but sent it anyway.