Sooooo after I let the car cool for a while I turned the key to ON to check for the leaking sound and there was none. Interesting. Then I swapped my Bosch III's in and went to the gas station to fill up. The car ran good with no apparent issues and the avg econ says 20.8 after a 12 mile trip.
Now I hear the spraying sound again from inside the manifold but this time it's coming from the other throttle bore. $#@!. So it looks I had a leaker the whole time but only when hot. At the beginning of this thread I said that none of the injectors visibly leak because I had the rail pulled up with pressure on it. But when I did that, the engine was COLD! Son of a bitch. So I now have 2 full sets of bad injectors and when I get the money I'm due for a SIXTH RnR of the fuel rail and injectors.
On the plus side, no more hard starts and no more stumble on acceleration which was likely the plugs. I've located some parts to build my own injector test bench so I can pressure test all my injectors both cold and hot. It will consist of a fuel pump, mustang fuel rail, and a small aquarium. I also have a couple commercial hand-dryers that I'll use to simulate hot-soak conditions on the injectors. It will come in handy as long as I dont burn the house down... I cant wait to get started on it... just need to win a few ebay auctions.