Aftermarket Dash Wiring

66 dart wagon,
Haynes does in fact have a manual for your car and it's still availible. The part number is 30025. It covers 1967-69 Dodge Dart, Plymouth Valiant, AND Barracuda. It for the six cylinders not V-8's but other than the engine it's all the same. If non of the parts stores around you are willing to help try Advanceautoparts.com ( also Partsamerica.com). I work for Advance Auto and didn't have a problem getting it. It should be alot of help without paying the 50.00 for a reprint of the factory service manual ( that's the best 50.00 you could spend on a book though)