These are the only games played by your 2 protagonists at CAP in the '70s Dec 1972: Wales 16 v 19 New Zealand Nov 1978: Wales 12 v 13 New Zealand (Andy Haden's dive cost our boys a deserved win linky) in 1980 there was this result Nov 1980: Wales 3 v 23 New Zealand
In '76 Wales played just 2 games at CAP, winning both. Sco were badly beaten 28 to 6 and France suffered a 19 to 13 loss, in another Grand Slam for Wales. In fact Wales' record at CAP in the 70's was exemplary, played 25, losing just 2, both NZ, and drawing 2, SA and France. Here is the complete record for Welsh home games in the '70's, confirming beyond doubt that they were rightly regarded as no1 for most of the decade.