I had to replace the pickup coil a few months ago. I've just now got around to adjusting the timing when what do I see? No marker to reference the timing. Don't know where it went. And now I don't know what my timing is at. The car runs but it pings under heavy acceleration. I know I can just fiddle with it until I get ballpark, but I would like to have it fairly exact at 13 or 14*. What do I do? Should I find top dead center on the number one piston and try to mark it from there? Whats the best way for going about this? Please help.