> I haven't done the research, but with this conversion, aren't you
> messing with the engine's ability to be cooled down by switching out
> which vehicle the motor was intended on being installed in without
> taking all the same engineered parts over to the new vehicle..

Nah, the wasserboxer radiator circuit is plenty big for an I4. Heck,
VWSA was shoehorning in the five cylinder inline back there with the
same ol' stock radiator and plumbing. These cooling systems are built
for the extreme case plus 10-15%, operating with the thermostat partly
closed most of the time. Pull the thermostat out and you should have
ice forming on that little I4.