Do you have your licence? Even if you are working only with 134 it is still a good idea. Are you only working on your own car or are you getting into this to work on others. If you are going to work only on your car that pump might do the job but if you are going to do much of it you might want to get something that works a little faster. Look at how much air volume the pump moves to get an idea how fast it will pull a vacuum. If you want your licence/ certification for automotive HVAC go to this site http://www.epatest.com/ and then go to the 609 section.

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1983 300SD
200000miles