Actually most R134a Conversions only require the oil to be changed. I am pretty sure that it runs at similar pressures as the R-12. A basic conversion kit consists of the new oil, different fittings (for filling and draining the system), and a few pounds of R134a. Also, the performance difference between R134a and R-12 is very small. Remember that all new cars use 134a, and their A/C can be very cold. Really, the difference is only a couple degrees F, and r-134 is MUCH safer for the ozone layer. Don't knock R-134a until you try it (or in someone else's car). ------------------------------------------------------------------------ eGroups.com home: http://www.egroups.com/group/dmcnews http://www.egroups.com - Simplifying group communications