I just finished installing a set of freshly painted BLACK WestCoast mirrors on the son's 1990 W250, complete with six-inch stainless spots and they are a HUGE upgrade over the **** little useless mirrors that were originally on there and it looks a lot more like a real truck now.
At a swap-meet, I scored a perfect set of the stainless F700 mirrors that RSDL speaks of and am seriously considering putting them on my personal truck, which has always had the stainless so-called "tripod mount" (which are actually 4-pod mount), wide-angle towing mirrors.
These mirrors are currently equipped with three five-inch spots; one each side to see the blind-spots and one on the driver-side to see the top of the stack.
The one looking at the stack is more for judging over-head clearance than for watching the black cloud of smoke.
Someone mentioned turn-signals; I have double-sided Peterson (I think) signals mounted on fabricated brackets that extend almost as far out as the mirror-heads.
These really help in keeping those ignorant right-side passers and right-side hanger-arounders out of the way.
I can't do pictures, but maybe some kind soul that has some pictures of my mirrors with signals will post them for us.
One other trick I always do to ALL of my mirrors --- I re-mount them as far forward as the doors will allow.
This is among my favorite MUST HAVE modifications and you will see why when you do likewise.
I would like to have a talk with whatever screw-ball decided that truck-mirrors should be mounted in the middle of the door; this holds true on most all trucks, big or small.
Even the factory-mounted F700-style WestCoast mirrors are not far enough forward to my liking.
My next mirror addition is a pair of those forward hood-mount spots; as good as my mirrors are, there is still a blind area beside me that has caused me more than a few close calls.