The Temptations had sunshine on a rainy day, John Denver had it on his shoulders, and the O'Jays took their cue from an old standard to address a loved one as "my sunshine." But Harry Wayne Casey and Richard Finch, forming Miami's KC and the Sunshine Band, had sunshine both in the band name and in the joyful, exultant brand of music they played. Big Break Records has recently reissued one title recorded by those disco titans, one title produced by them, and one with another connection to the