ok i rebuilt my engine and for some reason it wont start getting great compression i have the service manual and went by it step by step on the timing cam sproket 6 oclock and crank sproket 12 oclock lined up the distributor at #1 where it says on the distributor i just checked it and im getting compression as soon as it hits TDC but no spark happens when it hit on it can someone chime in please i need my truck by monday please and thank you