First time start - no go

You didn't say what type of ignition system you're using. Have you double and triple verified the firing order and correct wires to the correct plug? If the wires are correct, is number one wire going to number one plug when piston is at TDC when rotor is pointing to number one wire? . Hopefully they installed the timing chain correctly? I'm sure you got number one cylinder at TDC and verified timing marks at TDC??