advice on long life plugs?

[Simplstupd at aol.com]

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In my '82 WE 10v I have experimented with many different plugs.  With my
engine, with unknown original mileage, it runs the same whether I use Bosch
or Champion or Denso or etc etc etc

As far as longevity goes...here's how I look at it:  how long does it take to
replace all 5 plugs?  I mean c'mon 5 minutes tops.  it takes me longer to
open the trunk, get out the toolbox, and get organized than it does to
physically r&r the 5 plugs.  So why spend $5 on a plug.  If the $0.99 plugs
wear out in 4 months just replace them!

My 2 cents
Paul