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.
1889 (102-60) – WS Winner* (d Bridegrooms 110-52)
C Buck Ewing 5.55
1B Roger Connor 5.9
2B Danny Richardson 3.4
SS Monte Ward 2.05
3B Art Whitney .35
LF Jim O’Rourke 1.2
CF George Gore 3.35
RF Mike Tiernan 6.15
C William Brown -.15
SS Gil Hatfield -.7
P Mickey Welch 5
P Tim Keefe 3.2
P Ed Crane 1.15