Looking at pics of your engine compartment (again), I noticed that the nuts holding your underdash AC components to the firewall were black phosphate coated. I guess your originals were black. What I find interesting is that on one of my AC setups, the nuts were cad plated and the one I picked up a month or so ago the nuts were black phosphate coated. I had Eric do a set of each just in case I like one better than the other. Since the rest of the fasteners are cad plated, I'm leaning on using the cad plated nuts for the AC