>Would one of those "universal Ford style" starter soloniods work?  They are
>made to work at heafty battery currents, but not for long periods.

Dan,

As you mentioned starter solenoids are not designed for continuous duty.
Here's a
<http://www.aircraftspruce.com/catalog/elpages/masterrelay.php>battery
solenoid that is.

Angus

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Angus Gordon                       '89 Carat
NW Ohio                            '86 Syncro