What's going on Matt...
I'm gonna be as nice as I can in this response...
That being said...
Theoretically you could use any tranny on any car. If you got an adaptor kit to adapt it to bolt to your engine, and then all changes needed to make sure everything is aligned. Then you'll need new motor/trans mounts, possibly fab a new sub frame, and then after you just spent a few grand on nothing, someone tells you to go get the tranny that fits your car.
If you chose to swap transmissions you''ll use a MTX75 off of a Duratec. You can then take that transmission and modify it with all the custom gearing, shafts, synchros (or none), differential, etc etc. This will also cost you thousands upon thousands.
Transmission upgrades are fantastic. Typically you can kill 2 birds with one stone with tranny mods. You can use stronger parts to increase driveline strength, PLUS, you can change the gearing to maximize your engines output top the wheels.
Now, gearing is a wonderful thing to calculate with your engines power curve, and then decrease your times (depending on what type of racing you do) without any power increase. However this is not really the best thing for a street car since it's probably make the car tough to drive anywhere where you are not accelerating hard.
So you get a stock 00+ Mtx75 froma duratec and here are your basic options for it as of now:
-Quaife or Torsen T2 LSD (limited slip differential) <-----this is a must mod
-3.8 or 4.5 final drive gears: There are others available, but these are the main stream.
-Upgraded axles: Not internal part of the tranny, but if you go for a high HP application or choose to run slicks when racing, it is recommended
-Quaife Dog engage gear set: Very pricey, with really close gear ratios
-Sequential Gear box: This is available, but I don't know anyone with it.
-Focus shift tower: If you get an older trans, you'll want to upgrade this part for longevity purposes
-Internal rebuild: If you get an older trans, there may be parts like selector forks, synchros, etc that may need to be changed or upgraded
-Terry haines does some custom Trans boxes to increase strength and efficiency of the trans, but does not effect speed.
-Clutch and lightweight flywheel: Get a performance clutch to match your power outpuit, and a lightweight flywheel for decreased driveline weight.
I guess that about covers it...
So basically, you need a Duratec MTX75, and you can fill it if you so choose. But prepare to spend alot.
Terry haines I believe was working on getting the 6spd from the euro ST220 to fit our cars, but I'll have to recommended you stick with the five speed due to the "economy" gearing ford uses. Remember, more gears is not better. Keeping the shifts to a min, and keeping the RPM in the "sweet spot" of the power band is key in gearing.
Hope that helps...
Oh yeah, and understand those cars you listed are geared for a high revving 4 cyl...not your V6. So even if it did fit, you're car would drag ass.