Hey saleen,
Below is a snip from that thread I sent you in the PM. Posting here so everyone can reference it. Don't know if it'll help or not.
"on the engine deals, I use
www.car-part.com to locate pullouts. Give each yard a call, some will work with you more than others on entire pullouts/wiring/ect. In my case, I found a yard that would do the entire pullout with hoses/ect (notice how my upper hose re-used the stock F150 spring-lock type connector with a different radiator hose?), this will save you a lot of $$ in nickel and dime stuff.
Also, if going F150 and using my bypass technique, you can request the Body module from the donor pickup, along with the steering column so you get the PATS antenna and key as I did. Both of those cost me a addition $100 or so.
IT SHOULD be noted, that you CANNOT use my bypass technique on a Mustang computer/pullout. the Mustang ECU looks for the PATS request signal from the insturment cluster as that's were it's contained vs. the F150 has it in the BCM. I have flashed my ECU to a full Mustang over write, and attempted to re-learn the computer to look for the PATS but it will not look in the BCM if it's coded as Mustang. So, keep that in mind. I have cross referenced F150 AND Mustang ECU's pin/pin and electrically they are identical so they are interchangeable. Therefore, if you have a Mustang powertrain pullout, you could use an F150 ECU on the harness and be just fine as long as you re-work the F150's computer programming for the swap. Once HP Tuners gets their PATS bypass integrated into the scanner program, most of this paragraph will be obsolete. ETA was sometime between now and end of year last I visited with him. So, for now, those of us trailblazers with the 6R80 have only three options. 1. - Lund Racing's EPATS bypass, 2. - HP Tuners bypass (must contact Eric directly at HPT and requires ECU mail-in), 3. - Use the F150 ECU/BCM method I've outlined.
The F150 ECU is fine to use. With HP you can calibrate it to whatever your desire, the box simply controls the outputs based on your tune data. Now, one area where this will differ is when I finish hooking up the cruise control, as the Mustang ECU frimware looks for hard wired inputs into the computer from the steering wheel switch pack, vs. the F150's cruise inputs are received over the HS and MS CAN network via the BCM and SCCM modules.
More on that as I progress into full integration. At this point, the cruise is all that's left to integrate."