Welcome and happy mototing!!
You can find a lot of information here and on a couple of other websites. Check out:
Mike Dailey's site http://www.panteraplace.com/
Chuck Melton's site http://geocities.com/provamo72/
The deTomaso list may be of interest to you, also. http://ftl.realbig.com/mailman/listinfo/detomaso
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
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The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
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