New 383 wont fire

so if i am getting this correct you have checked that the distrubter is not 180 out. this my sound stupid but did you make sure that you have the fireing order correct. and make sure you did not flip just two around. I guess i would start from the top get the motor so it is fireing on no. 1 pull cap and make sure the distribtor is fireing no. one then make sure all the plug wires are correct i mean fuel spark it should fire i know this is basic stuff but sometimes this is the stuff that bites you