Ok I had a little time this week so I installed the power valve on the primary side 4.5. Then installed new spark plugs. Upon pulling the #3 plug it was arcking out on the hedders and I thought the sputtered was due to the backfire much smoother now. But I still need to recieve the distributor. And ill post up. How do you know when 34-36 degress of timing is met when the timing mark only goes to 18. And do I capp the vacum advance when doing so.