I decided to paint the valve covers on my 84. How hard are they to remove and put back on? What all will I need to replace once I go to put them back on? I had the gaskets replaced about 6 months ago, but they are cheap to replace again correct? Anything I need to watch when putting them back on? Any specific torque to tighten them to? I'm new to underhood maintenance and detailing, so any tips or tricks will be appreciated. thanks!