Hi Everyone! My cars are a '64 Chevelle Wagon and a '68 Cad Eldorado. The Eldo has GM's Automatic Level Control - RPO G-67. Through the years I've developed a good understanding of the Compressor-Reservoir-Regulator system. AND, I have an accumulation of parts that let me offer service/restoration. If your car's setup needs help, get in touch to see how I can assist. ~ Roy W. Rising rwrising@dslextreme.com