Ford: Hard starting f-150, engine vapor lock, altitude travel

Question
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Followup To
Question -
    I do not still have a copy of my original question, but I can give you a re-cap.

    It is a 1985 f-150 with a 351w. It always starts fine when cold, but after a hot soak needs to turn over several times to start. I mentioned that I have a clear glass fuel filter on it, and have watched it empty out after being run (this takes about 15-30 min.  As I mentioned in my last reply, the timing is at 10 btdc, and there is no gas in the oil, and fuel pressure is at about 7.  Also I have replaced the original four barrel with a 570 street avenger, however the problem was there before the change.
Answer -
ok  have you ck for vapor locking?

No, I haven't, don'treally understand the concept on it. (Although I sure should with as much work on vehicles as I end up doing.) How Can I diagnose and correct it if that is the problem?????

Answer
Vapor lock is the result of high altitude, high temperatures, or a combination on your car's engine. Vapor lock can occur at any altitude due to heat, but it is more common at higher altitudes, because gas at high altitudes vaporizes at a lower temperature. The resulting gas/air mixture can slow down or even stop the flow of gas to the engine, especially if your car is not designed for high altitude travel.   

The key symptoms that your car is suffering from vapor lock is a loss of engine power, a rough running engine, and/or a engine that will not start. To reduce the chance of vapor lock, avoid running the air conditioner, and at the first signs of power loss, shift your car into neutral and rev up the engine. Finally, be sure to shift to low gear when climbing.  

If your engine won't start due to vapor lock, here are a few good tips you may want to try to get it started:  
 

First, loosen the gas cap. Be sure to stand back when doing this because gas may spray out at you.   
Second, remove the air cleaner cover and hold open the choke flutter valve in the carburetor with a object, like a screwdriver. Be careful - backfires can occur.   
Third, start the engine, holding the gas pedal all the way to the floor - do not pump the gas.   
Fourth, wrap a wet cloth or cloth with snow around the metal fuel line near the carburetor (trace fuel line to make certain it goes to the carburetor).   
Finally, let the motor cool at least 30 minutes before trying to start the car.     Let me know if this helps.