The seven/one bench split was a gambit first employed in South Africa’s strong warm-up win over New Zealand at Twickenham in August, with the replacement pack brought on together and immediately win a scrum penalty.
Coach Foster has made a couple of personnel changes among those five replacement forwards, though, with veteran lock Sam Whitelock dropped to the bench and tighthead prop Nepo Laulala brought in at Fletcher Newell’s expense.
And Foster feels his side are fully equipped to defuse any potential bench impact.
“It is certainly a response [to the Springboks’ bench],” Foster confirmed of his tweaks. “Not so much a response to the power, but more to the techniques we expect to have to deal with.
“Nepo is a very strong scrummager and very experienced. He’s trained so well and has probably been disappointed that he didn’t play the last two. It is a great occasion for him.
“He’s alongside Samisoni [Taukei’aho], with the likes of Sam Whitelock on the bench, we really believe and have got a lot of confidence in that group coming on.”
The final should present a fascinating clash of styles, with Handre Pollard’s selection at fly half ahead of Manie Libbok another indicator of South Africa’s preference for a tighter game.
That contrasts with the All Blacks’ ability to keep the ball alive and play wide, ambitious rugby.
“That’s what I love about the game,” Foster said. “People play different ways and try different things. [South Africa] have got their way that they think suits their strength.
“The [seven/one split] doesn’t really change anything in what we do. It doesn’t impact our game and the way we want to play it. Our strategy suits us, their strategy suits them. It makes it interesting on Saturday night.”
New Zealand team to face South Africa at the Stade de France (Saturday 28 October, kick off 8pm BST)
Starting XV: 15. Beauden Barrett, 14. Will Jordan, 13. Rieko Ioane, 12. Jordie Barrett, 11. Mark Tele’a, 10. Richie Mo’unga, 9. Aaron Smith; 1. Ethan de Groot, 2. Codie Taylor, 3. Tyrel Lomax, 4. Brodie Retallick, 5. Scott Barrett, 6. Shannon Frizell, 7. Sam Cane (captain), 8. Ardie Savea
Replacements: 16. Samisoni Taukei’aho, 17. Tamaiti Williams, 18. Nepo Laulala, 19. Samuel Whitelock, 20. Dalton Papali’i, 21. Finlay Christie, 22. Damian McKenzie, 23. Anton Lienert-Brown