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.
1973 85-77
C Dave Rader .15
1B Willie McCovey 3.75
2B Tito Fuentes 2.75
SS Chris Speier 2.85
3B Ed Goodson 1.45
LF Gary Mathews 2.85
CF Garry Maddox 3.65
RF Bobby Bonds 7.75
IB Dave Kingman 1.3
Uti Gary Thomasson .5
IF Mike Phillips -.15
SP Ron Bryant 3.25
SP Juan Marichal Last Season 1.55 (60.05)
SP Jim Barr 2.85
SP Tom Bradley 2
RP Elias Sosa 2.1
RP Jim Willoughby -.3
RP Randy Moffitt 2.7
-Following the season, McCovey's dealt to San Diego for Mike Caldwell, but he'll be back - not coming back is Marichal, sold to Boston, through 2016 he remains the greatest SFG pitcher.