i'd like to use this R-134 do-it-yourself kit that i just purchased,
however i'm not 100% sure if my '90 Westy has been converted or not.

i bought the vehicle last summer and had it charged last summer by Ken
Morgan, here in Denver..........for those of you that are familiar w/
Denver area mechanics.  i don't remember much about my conversation w/
Ken in regard to this job, but i do remember him telling me that he was
going to put a vacuum on the unit to extract whatever was already in
there - he then filled it (with whatever) and i paid him about $75...i
think.

so, i pose two questions:

1. is there a way to tell if the system has been converted?

2. is there a chance that Ken filled the unit w/ R-134 (after vacuuming
or cleaning it) to run off of the original system?  (would R-134 even
work in the old (unconverted) system?)  ...if so, can i just refill the
system w/ R-134?

thanks for your help!!!
dusty.
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