Roy - the 2 locations I mentioned are the only ones on my 58, and aside from the phillips you listed plus those that hold the upper window garnish, the dash-windshield garnish, the seal retainer on the door bottom, the interior light, and the heater case, I can't think of where you'd find "tons" of screws of any type .... oh, one place I forgot, the lower window sash channels are held with stubby clutch heads - but I imagine there was variation among the different plants, as by the 60's there was a transition away from the clutch heads
Bill