I know I have been using names other than the boy's nicknames, so here are their 'real' names either that are from the movie, or that I came up with...

Jack: Jack Kelly, or Francis Sullivan depending on how you look at it...

Davey is just good old David Jacobs, although he does need a middle name...

Kid Blink: Louis Ballatt (Kid Blink, the real strike leader's name...)

Spot: Patrick Donahue

Mush: Michael Danial Meyers

Crutchy: Damian Morris

Racetrack: Anthony Higgins obviously

Boots: James Freedman

Specs: Gregory Adams

Skittery: William Ross

Bumlets: Henry Lang

Sorry this was kind of lame...