slant six cranks but won't start

I just spent a bit of time reading through this. Little feedback from the good dr.

Basics...confirm fuel spark and air.

Unclip the distributor cap and set aside. Turn engine over and confirm the rotor is actually turning.

Pull coil lead and hold close to a ground while cranking. Does it spark? Or pull a convenient plug, reinsert into plug wire, hold threaded base on ground and crank. Spark?

Can't see on my phone but with all that cranking, is there fuel in that clear gas filter?

Or Dr. Garrett makes a house call.