[Power Surge]

A rule of thumb for Ford tuning... the pcm will use the LOWEST value of any of your spark tables. So if say at 3000 rpms and 50% load your borderline is 45 degrees, and your max allowed (or base) is 32 degrees, it's going to use the base table, not borderline. Also, add into that all the spark adders. If you have an ECT adder factoring into the base table that adds 4 degrees at that same spot, you'll now see 36 degrees not 32. The spark mapping is pretty complex to begin with, and then you add VCT into it!

An easy way to control your spark, is pick one of the tables you have available, and use it completely. In order to do that, you'll need to make the values in all the other tables higher, so it won't look to them. That includes factoring in spark adders!

You shouldn't be seeing spark source 8 while you're driving, unless you are off the thottle at the time.

Is your load proper for light cruise? It should be around 20-50%. Your cruise EGTs are definitely from the low spark values. Lower spark will raise combustion temps. If you can fix your spark issue and get a nice 35-40 degrees at light cruise, I'd be you'll drop those EGTs down a good 300-400 degrees.