Regarding fuel pump buzz:
        It seems to me that all fuel pumps can be heard, some more than others
at some times more than others.  Usually you hear it more when you are
subconsciously "on alert", such as when you are far from home.
        I just check fuel pressure to make sure it's OK to reassure myself, and
then when I do go on a trip I carry a used but known good fuel pump
along with me.
        You can buy an inexpensive oil pressure gauge, and a 2' length of
rubber hose and a clamp at most any FLAPS for less than $20.00.  This
connects to the test point provided on the fuel line just to the rear of
the air distributor manifold very easily.  Just remove the little hex
headed screw and washer, and slip the hose over the fitting.  Tighten
the clamp a bit, and you're ready to check the fuel pressure.
        Having a spare on hand means that probably the thing will not fail on
the road for you, but if it does you will find that you forgot to put in
a screwdriver & pliers, which is really all the tools you need to change
the fuel pump.

My 2 pf.

Chuck Hill