Hey Joe, I detect a fellow subcriber to Hemmings Muscle Machines.

Anyway, regarding  Jeffery/Amar's question, if you want to take the
heater core out of the system, the easy way is  just  to loop a hose
from one outlet to the other.

If you don't want to do that -- it would look cobby -- that
block-mounted heater hose connection is a screw in.  Take some vice
grips to it, maybe soak it first in some PB Blaster or WD-40 or
whatever penetrating oil you can find, maybe apply a propane torch to
the block, and twist it off.  Careful, though, not to break it off, or
you'll need a giant easy-out to remove it at that point.

Whenever you're plugging a hole and fluids are involved, you've got to
use an NPT plug, aka pipe threads.  These fittings a slightly conical,
so the male gets stuck in the female the farther you screw it in.  (I
hate it when that happens.)  I''ve not done this, but I'd guess there's
some kind of NPT reamer to make the hole the right shape, then you'd
need an NPT tap to make the threads.

A rubber plug is not going to work on the  water pump, either.  What
I've done with vacuum lines is cut a little bit of hose and thread a
bolt into the end and use this for a plug. I think if you did this with
hose clamps on both the fitting end  and the bolt end, it would not
leak.  You could use this method  on the block fitting too, but it
might look a little cobby too.

By the way, even if it's not cold  in South Africa, a heated defroster
can be useful in the rain.

By the way part two, what's the "vs. Windsor" part?

180 Out