Two cautions about the R134A conversion !!!
One ... Use Ester based oil PAG oil is for new installations only.
Ester oil mixes with R 12 oil..
PAG oil is *not*
compatible, and will damage system
Be cautious of sealers, boosters, and the like, most
use PAG oil, and will damage system. Ester based oil shots are available
wherever R134A is sold. A single can will do.
Two ... Install the Acme type valves that come in the conversion kit. **
use compressed air to
test an R 134A system ! Compressed air will oxygenate R 134A, producing
a combustable mix.
I converted both my El Caminos some time ago, and am happy with results.
R 134A isn't as good a refridgerant as R 12, so performance will be *
poorer. On the other hand, top offs are much cheaper,
which more than makes up for any loss in performance.