Engine cranks but wont start

. Having just taken the car through an emissions inspection, I found my Hydrocarbon outputs a bit too close to the limits, so I felt a tune up was in order. I have replaced the spark plugs, wires, distributor cap and rotor, both fuel and air filters, some leaking fuel lines that I found in the process, PCV valve, and I changed the oil. Now, the car will not start. I have verified that I have spark from each of the spark plug wires, (By holding a connected spark plug against the valve cover with pliers and cranking the engine.) And the firing order is the same as when the old components were removed. (I made a diagram.) I do have fuel getting to the carburetor and all vacuum lines are connected where they should be. Compression should not be an issue, because the car ran before I did the tune up. I have checked everything that my Haynes manual has recommended me to try. The PCV valve fits into a socket on the block and a tube leads from a nipple on the PCV valve to the intake manifold. The old valve was dangling from the tube, and not fitted into the socket. I put the new one in correctly, however this should not affect the starting of the engine. I walked to a Honda Dealership and asked a mechanic if there were any other things I should check. (I do have fairly good mechanical knowledge and experience, but it's always good to ask the experts.) I have also tried replacing all the old parts that I removed, including the leaking fuel hoses. There is no way I could have installed the distributor cap or rotor 180 Degrees out of phase, as I have purposely tried to install it wrong. Ether starting spray will not work, nor will cranking with the throttle to the floor, with or without the choke propped open. I have let it sit for a few hours with the plugs out to allow any excess gas to evaporate. I am all out of ideas, as is my father, and several mechanic friends.