scroupious

I just installed new timing chains,gear, cylinder heads, camshafts JWT C2
headers.I have the car all put together. I tried to start the car nothing, fuel pump cycles and put out 45psi but no spark. put timing light on the wire the nissan manual tells you to check nothing. Pulled a coil and plug and ground that out still not spark. Checked all my grounds seem good. Where do I begin checking?

Thank you for your advise greatly appreciated. Once she starts it is off to get tuned