I was able to locate some 90 octane pure gas, so I am going to run that tonight. I think I am going to jet it down some, as when I cut the plugs it looks like it is rich now and it is suppose to be 15 degrees warmer today than last weekend. I am also thinking about going ahead and adding two degrees of timing. I am curious if the 87 octane is part of my problem, as when I went to shut if off last weekend it wanted to run on for just a second. I do have the timing locked out, my box will pull 20* when I start it. It will idle right around 1,200-1,300, so the run on may be a high idle and 87 octane. The engine itself by water temp was very cool, it was hard to get it to over 180* last weekend, so I want to say it is not running hot. When I have had run on in the past with the iron heads I was convinced it was hot because it was lean (water temp 200).