Thanks everyone for posting. I measured the high ACT temps when the ambient was 75-80*F. ACT sensor is in the stock #5 input port.
I noticed something wierd tonight on the way home. It was raining so traffic was slow and when I would lug between 1500-2000 RPM at light throttle tip-in it wanted to chug and miss, guess I don't drive like this much! Anyway, I'm going to try and pull a few degrees out of you timing table from lower loads to see if this helps. I think this may be what is going on so time will tell.
Pics are on my website but they aren't up to date.
http://www.geocities.com/dbennettya/Mustang_PCM/
Dale, EGR multiplier is 1 54* and above. I don't see what the ISC adder is going to affect this, but it is pretty much stock except I took out the speed increase for higher ECTs cause I have an electric fan now.
Don