a month working on it every day? if you've got sleep, a few friends to stop by here and there, all the tools you need, and a basic knowledge of what you're doing, it shouldn't be an issue... as shane? said, it can be done in a weekend...
i've had the motor in my mustang pulled, engine mounts changed, oil pan gasket replaced, motor back in and running in 4 school days (highschool) so that's like 5 hours a day, but only 2-3/4 blocks, so 2.5-3.75 hrs a day x 4 days, so 13 hours labour...
if it's the same motor going in as coming out, you shouldn't have any issues... if it's a different motor, you might have issues with wiring