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Ok I know this is way basic, but consult a Haynes , Ciltons, or similar manual and confirm that you are looking at #1 cylinder, as different manufacturers put them on different sides.

Oh, and that...

With cap off visually confirm rotation of rotor, then confirm the wires are on cap in correct rotation and sequence

Hey, This just in: have you confirmed zero on the harmonic balancer? You can reach in to the plug hole on #1 with a screwdriver and feel for TDC while you move the crank by hand.

I like to verify dizzy by putting the engine on the timing mark, and rock the dizzy back and forth with ignition on, looking for spark: with a plug laying on the block.

Also, a single backfire can destroy the power valve (I seem to recall this is especially true for Holley, and anti backfire kits are available)

Six main functions of the carb: #1 would be to deliver the improper fuel to air ratio under all conditions. Hence EFI.
(Sarcasm alert)