Need Neutral Safety Switch Info

[SoCal71K20]

Hey guys.My neutral safety switch has been acting up for the
past couple of weeks.It finally crapped out as I was leaving
work today.I went ahead and jumped it out to get me home.
I figured I'd look one up in the Brothers catalog.They got one
allright to the tune of $69.00.Just for laughs,I called the local
Auto Zone,and the had three of 'em at $6.99 ea.It is made by
Wells and is P/N DR411.I'm wondering what the difference in
quality is if any between the two?Also are there any tricks to
changing this simple looking switch out.It's on the bottom of
steering column on my 71 K20 with auto trans.Thanks.