By Tobias Carroll Most long-dead writers born a century ago can’t be said to exert much influence on contemporary pop culture. Jack Kerouac, however, remains an exception to the rule. March 12 of this year marks the hundredth anniversary of the Beat writer’s birth — and, unsurprisingly, it’s led a number of writers to ponder Kerouac’s legacy. That influence isn’t limited to the literary sphere, either; last year, the long-running online music magazine Perfect Sound Forever explored Kerouac’s impact on the musicians and songwriters. On Friday, Literary Hub published a number of documents from K…