Scott, those were the "S" series and "R" series valiants. They introduced push button auto trans to Australia. An acquaintance of mine bought one about 4 yrs ago in good tidy original nick, and paid $7k or so. The "Chequered Flag" grille was a popular option in the day. I hope this is helpful, and I wish him luck as they were popular and reliable cars and considered highly appointed for the cost.
Cheers, Ron B