>
> dimensions for the bong - the one that eludes me is  how long or tall to
> make it. I know instructions say tall enough to be over the height of
> the radiator vent - but just how tall/long/high is that? Does anyone know??

There is an answer to this.  If you make too long, it won't fit in the back
of the van.  :)  So the westy  version is a few inches shorter.

I built one after I swapped my radiator.  It makes the process easier I
think, but it is not a must.  Run the van for a while and rev it and fill.
 Doing it without was pretty easy as well, just more chance of it
splooshing out.

I would say the more important skill is knowing how to bleed your radiator
for air.  I would do that after using the van for the following week - or
until there is no more air in the rad.  With the right wrench, you can
bleed it without taking off the grille.

Tom