Few problems i see:
1. the escape comes with a 2.3l which has 150-171 hp, and 150-170tq, depending on your model year. While the horsepower is very similar the torque numbers are definitely higher than the SVT. Also, the SVT is a top-end engine, below 3k, its worthless.
2. The getrag transmission is built to keep the SVT engine at or above 3k rpm, and it is also a close-ratio transmission, which means it is geared for the track, not for daily stop and go life.
What this all translates to is you having an engine that will feel gutless and lifeless when put in a car that weighs 300lb more than the vehicle designed for. And a transmission that isnt designed to pull the weight either. You will find yourself revving the engine and working the clutch ALOT more than you normally do to make the vehicle go.
If I were you, id ebay/craigslist the SVT engine, and spend that money you make on a few engine mods for what you already have. Realistically speaking, it wont be hard for you to make another 30-40 hp out of your current engine, it will be faster, and easier than swapping in a whole other engine.
OR, if you want to be cool, go buy a MZR engine from mazda, its probably the same block as yours, meaning it should be a direct bolt in, drop that 6 speed in, and have a 260hp sleeper king.