In that case my distributor is already pre-computer. Saves me some trouble but I would hoping that this was going to be the solution.
I just ordered a tach for under the hood. Once it arrives, I will plot the advance curve and see what is next. Luckily, the Jeep is completely usable as is, so there is no rush. If the advance is late, like I think it is, then I will make either a spring change or a weight change. As stated, it does advance, but I am not sure that it revs high enough on the road to start advancing.