* Scutaro drives in winning run * Posey slams two-run homer (Adds quotes, detail) DETROIT, Oct 28 - The San Francisco Giants capped a wild post-season ride by beating the Detroit Tigers 4-3 in 10 innings on Sunday to complete a four-game sweep and be crowned World Series champions for the second time in three years. Marco Scutaro, the most valuable player in the National League Championship Series, was again the hero for the Giants, cracking a sharply hit single into shallow center to bring in Ryan Theriot with the winning run. ...