Well considering the stuff I put in the tank is flammable too, I don't mind. That seemed to be the biggest concern expressed by people. As for the legality, i was having trouble determining that. As of '03, it was not illegal in CA which is odd since sneezing without a catalytic converter is illegal. I know it is illegal in Arkansas, Arizona, Connecticut, Florida, Idaho, Iowa, Indiana, Kansas, Louisiana, Maryland, North Dakota, Oklahoma, Texas, Utah, Virginia, Washington, Wisconsin, and the District of Columbia. Maybe it has changed now.
Now, I did install this in a completely original R12 system with no conversion to R134. I did this knowing for a fact that it would fail and I would have wasted money. Here is the result:
1. No receiver dryer change
2. System evacuated after replacement of compressor (done at a shop)
3. Red Tek Stop leak used 1 day before charging of the system.
4. 5 cans of Red Tek were used for some reason to get the system to 35 psi
5. System blew as cold as my 134 converted system with none of the strain on the engine. No colder, no warmer
6. The ability to crank over the compressor was vastly improved. It runs like the r134 / Rotary compressor in my other two Pintos and my Fiat.
Too early to tell but in the course of 2 weeks, the AC has been exceeded my expectations which I sadly were low but it works much, much better than my 134 converted system and was about half the price. Mind you, this is all temporary as all the other cars will eventually get modern 134 system upgrades but this car is about 2 years off and I will not tolerate a car with broken AC, or anything broken for that mater. I hope it continues to work as well as it does for the next few years.