Wales head into Sunday's (NZ time) clash against the All Blacks having not beaten them in their last 29 matches dating back to 1963.
To help the Welsh prepare, they have brought in some former greats as they look to end their 64-year drought.
On October 31, 1972, Welsh club side Llanelli famously beat the beat New Zealand 9-3 at Stradey Park - a result considered to be one of the greatest in Welsh rugby history.
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The man who captained Llanelli that day was Delme Thomas, and he has been called into the Welsh camp to talk with the players who will face the All Blacks at Millennium Stadium on Sunday (NZ time).
"We benefited from having Delme Thomas come to the hotel last night and he spoke to us as a front five," said Wales forwards coach Robin McBryde.
"They were wise words and it was good to hear him.
"As captain of a successful Llanelli team and also a successful Lions tour as well - he just shared some of those experiences.
"He's a very humble man, Delme, and he didn't go into too much detail, but obviously the psychological factor is a big thing.
"Sharing his experiences with us as a group was something private and we respect some of the things that he told us."
The All Blacks are without a number of first-choice players for the match against Wales including Kieran Read, who has been battling with hip and back injuries.
Read, who has played 108 games for the All Blacks, was replaced by the inexperienced Luke Whitelock, who will feature in his second Test.
With Read missing the match, Luke's brother Sam will captain the All Blacks for the first time - becoming the 69th man to captain the world champions.
Even though the All Blacks will be without their influential leader, McBryde knows the All Blacks will still be a tough team to beat.
"He's obviously a very experienced player and he has a big influence on the team - to try and replace him is very hard.
"However, it's the last game of an unbeaten tour (for New Zealand) and they'll have a point to prove. That'll feed into their hands with regards to feeling like they've got their backs against the wall.
"That, in many senses, makes them a lot more difficult team to play."
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