when i first fired mine i left the radiator cap off then left it only on the first click (or half turn) so it doesn't pressurize. Just keep it topped off and drive it for a couple days with the cap only on the first position. It won't hurt anything to drive it like this so leave it like that till you are convinced it's all out. If your radiator is always full when you check it or if your overflow tank is always the same then it's all out. Mine was all bled the first time the thermostat opened so if you think its running hot I wouldn't point the finger at trapped air.
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'89 S15 4x4 350TBI/700r4
restored body, paint,
3" lift, crane cam, vortec heads
'88 Iroc 350 carb, TCI 700r4, 380hp