My WAR calculation is a combination of Baseball-reference and Clay Davenport; I believe it to be the "best" WAR number available for historical comparison. 8 WAR is an MVP quality season. The record is pythagorean adjusted for 162 games.
1962 98-64
C Tom Haller 3.6
1B Orlando Cepeda 4.3
2B Chuck Hiller 2.7
SS Jose Pagan 1.6
3B Jimmy Davenport 4
LF Harvey Kuenn 2.15
CF Willie Mays 9.9 MVPQ
RF Felipe Alou 4.1
C Ed Bailey 1.85
LF Willie McCovey 2.2
OF Matty Alou .55
SP Billy O Dell 2.7
SP Jack Sanford 3.45
SP Juan Marichal 3.85
SP Billy Pierce 2.65
RP Stu Miller -.1 (13.7) Final Season.
-Just like 11 years before in New York, the Giants take a 3 game playoff against the Dodgers to win the pennant (and then lose the Series to the Yankees). It's the tenth time in franchise history the Giants lose the Series, 4 of which coming to the Yanks. Mays has his 7th MVPQ season (8+ WAR) tying Mathewson, it's his best year since '54. The entire Giant starting 8 is at least 1 win above replacement for the first time since '53. McCormick leaves, but he'll be back. It's Stu Miller's last season and Gaylord Perry's debut.