Finally received an email back from the powerupfit website which repowers old military vehicles for shipment to foreign countries. They don't do Isuzu vehicles, but recommend buying used diesel engines from Japan. The Cummins turbo sounds like it might be a reasonable replacement for the C223T, but fitting it to the Trooper bell housing/tranny/transfer case would probably take some specialized fabrication. I originally saw it on an ebay auction http://cgi.ebay.com/ebaymotors/Cumm...iewItemQQcategoryZ46098QQitemZ8015013423

Sae #4 flywheel with 10 inch over center clutch.?