Here is a pair of O.E.M. torsion bars from a factory-V8-equipped 1966 Valiant.  The part numbers  on the one are 890 UWS and 325 DDCD R and on the other 891 CPS and 395 DDCD L.  Thoroughly cleaning off the dirt and paint, I get a diameter measurement of .85" with a micrometer.  Look to be in good, undamaged condition.  Buyer to pay shipping based on location, $60 for the eastern half of the US and $40 for the west coast (if you're on the west coast and eBay charges you the full shipping, I will refund you the difference of $20).  International buyers, please inquire for a shipping quote.