Just went out and checked, and I apparently dreamed I had a cat after the flex-pipe. So mystery mod is out for sure!
On the subject of heat, where on your temp. gauge does your needle sit when at top temp. and what thermostat are you running? I am considering a 180F, however it's not a Ford part and has no air bleed. Any input? Can you reprogram the cooling fan to cut in sooner?
Cheers,