blown 440 timing help...

iam not sure why iam have issues getting the timing set....but here is what i did, #1 tdc 0 on the timing tab and i marked my crank hub there as well, got my new adjustiable timing light today, not much instructions came with it, seems simple though. got the engine up to temp, idle aroung 950, looking for base timing of 18, set my light to 18, mark is way off...so for kicks i kept moving the advance on the light until my mark lined up with 0 on the timimg tab...it was at 58...wth....having a dumb *** attack