crazed vanagon list member bespoke thusly:
> RVC:  On level ground at 8000' ASL into a 25mph headwind what
should one
> expect for top speed in a fully loaded 89 westie?  at sea level
a 25mph
> headwind is pretty limiting, at 8000 feet?

RVA: it's a trick question.
there is not such thing as "level ground" at 8000 feet altitude.
:)