What are some of the ways to keep heat out of interior of TD?

["jimmy dunn" <jimmydunn@mindspring.com>]

Hello,

        I would like to know about the different ways
that are used to keep the heat out of the cockpit of
a TD.  My seems to still get hot even though I have
put in insulating matting.  The engine temp runs around
75 to 80 C on very hot days.  Please let me know what
you have done to reduce the interior temp.
     BTW, where does all this heat go in the winter?

 Thanks,

  Jimmy Dunn
  52 MGTD