if there's you, your brother, and his friend, and you have two weeks, you really should be able to get it done. This is assuming you have all thr appropriate tools/stands etc etc...just wake up, eat breakfast, work on it, eat lunch, work on it, eat dinner, work on it, sleep, repeat.
if you guys do more than just a couple of hours every day, and your brother just graduated from UTI and you've been reading a lot about it, you should be driving your car all nice and fine within two weeks...unless god forbid something bad happens...
either way, good luck with the swap man, should be fun