What does the gap look like on the passenger side?
If it looks normal, you may try loosening the driver fender's top bolts, prying it out and retightening. This is limited to what play is available with the bolts through the holes, and you may get less movement at the cowl, but more movement as you go toward the grille.
If the passenger gap is wide, adjust the hood.
A redneck shadetree way to adjust a hood involves 2x4s and judicious prying of the slightly opened hood, but I don't want to recommend it.
Once the hood is centered, the latch may need adjusting, too.
Panel alignment can be aggravating as hell; I think I know why the really good body men tended to drink a lot.