This is my first post and I am having trouble. The truck just cranks but won't start after installing the weber carb.

Background:
Removed engine and trans to replace rear main seal. When I placed the motor back in I replace the alternator, water pump, radiator, spark plug wires, rotor and rotor cap.

Upgrades:
Pace setter headers
Weber carb

After hooking everything up and refilling all fluids, I turned the key and it was going to start. I waited for about 5 min and now it just cranks but wont start. Carb is getting fuel, tested the spark with a screwdriver, tested secondary for the coil. Vacuum system has been removed except the line for vac advance from the distributor. I am all out of ideas and could use some help. I attached pictures if that helps. This is my first time doing this so maybe there is something I am missing or not seeing.

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