distributor intermeadiate shaft?

You can buy a TDC piston stop at Summit or Jegs. The balancer is stock 360. The balancer and timing cover line up at TDC#1 0deg when piston stop used. If you put timing light on and set timing at around 10deg or so, it won't run. Turn distrib. to run and check timing. It's around 40-50 deg by light. No vac adv. connected. It runs great and has plenty of power and starts well. You just can't time it with a light. I have used a regular and dial back light to no avail. This drives me nuts that I can't time it with a light.8)