performance_stangs97

Ok guys, i have a few questions to ask. I have a 97 Mustang GT 5 speed with the 4.6 SOHC. I am going to be pulling that engine out and swapping in a supercharged 99 Cobra 4.6 DOHC engine with the 6 speed manual transmission. I found the supercharged Cobra engine with only 9k original miles and 6 speed transmission for $950!!! I guess my questions are:

1: Are the engine and transmission going to be easily transferrable?
2: What all needs to come with the engine and transmission to make it work perfect?
3: Is it worth the trouble most of all? lol

Guys, ANY advice would be very helpful