383 intake gasket and valve cover choice

I have always use a valley pan with two gaskets on each side when in stalled with an aluminum intake. Years ago I had nothing but intake leaks. With the expansion and contraction on the aluminum, your intake bolts will start to get loose. I also check the intake bolts every spring just to make sure they are tight. Since that I have not had any problems with any motor. Just my experience with intakes. Everyone has their own opinion.