Update: Gaskets are in and I am ready for final assembly this weekend.
On another note, I have been calling all around this great country of ours. The issue is that the 2005 Saleen has stock computers and the "Cammer" will have the FAST EFI ECU...... Getting them to play well together or at least split responsibilities has been interesting. Was told that Stock ECU in the Saleen will not work at all once you disconnect the engine harness from the old 4.6 modular. Also, FAST EFI I have can not piggy back off of the stock ECU to let it know there is an engine. So then I called FAST and spoke to them..... They just kept saying its a stand alone system, however they referred me over to a guy named Brian Macy in NV at Horsepowerconnection. He has experience with Wiring up EFI's in these newer cars. He said he has a special wiring harness that will work with the FAST XFI system, but it still wouldn't help me because it works to make FAST EFI work on a stock Mustang modular motor.... He did, however, explain that I shouldn't really have any issues (that he can foresee) except for the instrument cluster. I guess there are separate modules that control the cars electronics (like abs brakes, power windows, airbags). He thought the only Computer I would have an issue with is the one that monitors the engine, speed, tach, pressures, etc. He suggested it would be easier to just get new gauges.
Then I was off to find someone who makes an "Autometer" type gauge cluster for a 2005 Mustang .......and no one does! I did manage to find Florida50 (right here in my home town!). They were a referral from my Machine shop guy. They make Autometer guage clusters for Mustangs up to the year 2004 LOL Oh yeah! Just my luck. However, he did tell me that they are currently working on the 2005 and hope to have them out for sale by Year end (or a little before).... He took my contact info and said it it all plays out right, I may be able to even get ahold of the prototype just to get things moving. Anyway, I will worry about gauges when all is said and done. At least I know the car will start (FAST EFI ECU) and that everything except the gauges will work (For now). Perfect!