Advice Needed - Can't Start Rebuilt 273

I do everything by hand. Start by pulling all the spark plugs out. Turn the engine clockwise only, tighten, on the crank bolt. Add about .002" to both gaps because it is cold. My guess for gaps are .016" for intake valves and .021" for exhaust valves. Some cams call for a .028" gap hot. Anyway, that means you need a .018" feeler guage for the Intake valves and a .023" feeler guage for the Exhaust valves. Turn the engine over by hand and adjust the valves while they are on the base circle of each lobe. As you move through the lobes go back and keep checking the gaps of the other valves that are on the base circle and tighten or loosen as necessary untill you are confident that they are all gapped correctly. I've found the charts are not the end all. When this is done, screw in a compression guage into #1 cylinder and turn clockwise untill you start getting pressure. A finger in the spark plug hole works too. Keep turning clockwise untill your damper is at 0 degrees. You should be at TDC on the compression cycle. Always check TDC on the timing marks is TDC of the Piston. Mixed dampers and front covers? I've seen them way off. Now pull the cap on the distributor. The rotor should be under #1 spark plug wire terminal. You have Compression. You have Fuel. And you have Spark. The engine should fire right up. Adjust timing. Do your cam break in. Then, I make the final adjustment with the 016" feeler guage for intake valves and .021" feeler guage for exhaust valves with the engine running. Can you say messy? Readjust after about 5,000 miles and you should be good for almost ever.