[Fireguy50]

What engine? 5.0L? 5.8L? some weird stroker?

What is the aplication? daily driver? mud drags? rock crawler?

 

[Fireguy50]

Of that one, well not to be an ass-hole.
But ion sensing is really a EFI system, and it is the wave of the future. I have no idea how it works, but it sounds cool.
PLUS, it matches his user-id LOL

 

[Fireguy50]

Keep the stock Ford computer. build something like Time (Crazed) just did.
If you want to stroke it, or add a blower, go with a Mustang MAF conversion. Get a Tweecer if you want to laptop tune it: http://www.tweecer.com/

If you want to drag race and have $2000-$4000 F.A.S.T. EFI is the best aftermarket setup in my opinion: http://www.fuelairspark.com/

GM TBI is crap no mater where you get it, or how cheap it is.