[F'in mine]

Daniel, just throwing out all possibilities. If you're able to check with the guys you bought the engine from, try to see if you can find out the specific crank they used. I realize it had external components but just in case the wrong parts went on.
You purchased a new flywheel, is it the one with the weight pad that's bolted on? I realize this is a alot of bs but maybe take the weight off and see what happens.

The plugs look okay, the cam specs seem to be a bit high for the compression you're running. I'm wondering if that has an effect on the run cause Lunati says it requires a minimum of 10.5 compression.