Three simple mistakes often occur here, so please pardon the assumption.
1) The distributor rotates COUNTER clockwise. Make sure you have the timing order going in the right direction.
2) The timing may be off by 180 degrees. Find TDC on #1 to verify that you are correctly timed. If you are 180 degrees out, the timing light will still make it look like you are at #1 TDC when you are at TDC for #6.
