To get the most out of the conversion, you should vacuum the system first. Then get the complete kit, which will include 2 cans of R134A, and the Oil Charge, which is absolutely necessary. The oil charge is a seal conditioner and system lubricant. If you don't add it, you'll probably destroy your compressor in short order.
You may want to pick up another can of R134A as well. I've seen the full kit as cheap as $34.99 at Wal Mart a year or two ago.
|