Them heat boxes are mysterious things.  They _do_ help the bus run cooler 
(on a stock motor and with all the hoses hooked up--with all those rust 
holes, the cooling power of the fan will be reduced).  Plus, you may 
actually need heat, even in a Grand Junction summer (!) though mostly for 
defrosting purposes.  I encountered snow at a mere 9000 ft. (La Veta 
pass, near Alamosa/Walsenburg) in Southern Colo. just last week (!).   

JKH--Albuquerque, New Mexico
1970 Kombi
 > 
> On Tue, 6 Jun 1995 Ramona71@aol.com wrote:
> 
> >     Ramona's heater boxes are all rotted out. I could replace them when I
> > overhaul the engine, but do I really HAVE to?? Does it affect her cooling
> > system at all to be sans-heat? Will I really need it when I'm driving
> > cross-country in August?? Yes? No? Hmm.
> 
> As I recall you're coming out to Colorado, Grand Junction wasn't it?  Not 
> that it's going to make a _whole_lot_ of difference but you'll need those 
> heater boxes when December rolls around.  Maybe sooner.
>                                           ^^^^^^^^^^^^
> Jack
>