318 to 440 Swap

Ok so I'm new to all this am trying to learn. But I've found a 440 that came out of an automatic 1971 satellite for $600. It has around 70,000 miles on it and he said it ran good with no smoking or anything to be concerned about. Now I have a 74 Dodge Dart Sport with a 318 3 speed in it right now. (Its burning some oil too) My question is; How hard is it going to be to drop a 440 into my car? Can I drop it right in or what is it going to take for me to put it in place of the 318? What are some of the problems will i run into doing the swap and what should I look for when looking over the motor? ANY Help would be great!

318 to 440 ? First off - YEEE HAAA!!!
With that said you'll likely need a rear end to accommodate for all the new found power. You'll need a new drive line to fit with the new tranny that you'll need to fit the big block. You'll need new motor mounts. Most people will tell you unless you seen the motor running and drove it yourself you're buying a core motor. And lord knows those are just the simplest things to think about. Others will chime in soon with the the BIG list.
good luck and have fun!!