Apparently, Charles Bukowski wrote in the introduction to John Fante's Ask the Dust, "Fante was my god." And Fante is credited with influencing Kerouac, too, although I can't seem to triangulate that fact with anything I consider "scholarly."
I haven't read any Fante. I did try to watch the Colin Farrell-Salma Hayak film of Fante's novel, but it put me to sleep faster than a double shot of warm Bushmills.
Ask the Dust has no preview available on Google Book Search, and limited "Search Inside" options on Amazon. It starts:
One night I was sitting on the bed in my hotel room on Bunker Hill, down in the very middle of Los Angeles.
It goes on in a very Kerouacian style. Actually, I liked what I read. I may have to settle down and read the whole book.
So now you know, perhaps, of another influence on Kerouac. And Fante looks a little bit like Jack at first glance, don't you think?