>I plan to run half-inch copper plumbing piping either through the fittings
>in the body work that would normally be used for the radiator hoses, or
>through the central area that currently (also) holds the main heater duct.
> This copper piping will not be prone to leaks, and also will serve to help
>shed heat on its way up to the front and on its return.
>
>I plan to do much of this work in the coming weeks, and this is why I'm so
>interested in your answers.

Steel or aluminum would be a better choice than copper. Copper is not a
good choice in a high vibration environment, as it tends to work harden,
and crack. This is why it's illegal to use copper line for brake lines.
(although some are copper plated, to prevent rusting).

Joshua Van Tol -- jjvantol@uswest.net