Make sure you get everything including the hoses. You would not want to use the original hoses since new ones are so cheap and are far higher in quality, but you will need the originals to know what type of replacements to get and how long they should be.

If you can find a A/C parts house near you it is possible they can guide you though the R-134 conversion. It is really no big deal; you just replace the expansion valve with the newer type.

This will allow the 134 to work at a higher level. The original expansion valve will still produce cold air, but the newer ones made for 134 will produce colder air faster.

And don't forget the aux fan in front of the radiator. It is there because it is really needed to deal with the extra heat generated when your A/C system is running.