I wanted to thank everyone for their help. From the helpful suggestions here and from a great article in Ford Muscle, I was able to make a few tweeks and complete eliminated the pre-ignition detonation issue. I was able to back off the initial timing by a few degrees and lowered my total advance at 3,000 to around 34 degrees. I was at 39-40 and that was too much. I'm now in a much more comfortable set point. I was hoping to find the vacuum advance diaphram to retard just a little on the advance under load scenario before the RPMs kick in. I was unable to locate the vacuum advance and am now left wondering if the car just has the mechanical timing advance from the springs and weights. Anyone know where I might find the diaphram? The only vacuum diaphram was located on the carb for the secondaries. The car runs perfectly and I appreciate all of the help along the way.
Below is the link that was very helpful to the issue.
http://www.fordmuscle.com/archives/2...ng/index.shtml