fuel delivery problem

So the first time I took my wife for a ride in my newly acquired torino. 351 c 2v,, I go down town and put gas in it. I leave the gas station and start up the road and the car starts to die like its running out of gas. Lucky there was side street to swing into with no power steering. So I pump the gas and it starts back up , I run it a minute and it seems fine so I Drive it home without issue. I take the air cleaner off and rev the motor with a light in the carb and see plenty of fuel and the motor is running fine. So I go back out and drive it with no problems for maybe 15-20 miles. I took it on a couple of other short test drives since without issues. Today I drive the car about 5 miles and turn it off for 15 minutes, start it back up and start on my way home. On the way home it dies again and clearly is starving for fuel I manage to limp it home starting and stalling and pumping the gas . I take the top of the carb off and there is not much fuel , less than half. and I see little bubbles of fuel burping and farting around the shut off pin. I check the filter and it is clear and looks new, I take the shut off pin out and it all looks fine. I blot all the fuel out of the bowl , I crank the motor and fuel starts coming into the bowl and there are two places at the bottom that I can see the gas trying to boil. I check the pump and it seems fine I blow back into the tank and its under fuel making bubbles. everything seems fine. The motor was just up to temp with no signs of overheating. The fuel line is the factory steel routed through the front part of the motor ,not touching anything. So I am thinking its some kind of vapor lock issue? So all that being said is there some kind of known weakness on the 351c with maybe exhaust passages, ports, under the carb making things too hot? Nothing worse than something to worry about that you can't see. Hope someone can help point me in the right direction. Thanks in advance.

I only have a factory temp gauge which is sitting lower than middle range. and the temp outside at the time was around 65-70. No signs of over heating and I think the cooling system is clean and doing as it should. I am perplexed . tomorrow I will try to get a temp reading under the carb. Thanks for the input.

kinda sounds like a vapor lock but that's not overly hot, heat soak or boil-over usually occurs after you shut off a hot engine and the heat transfers into the carb... then it's flooded when you try to restart it after it was sitting for a short time... a plastic phenolic spacer between the intake and carb usually fixes that issue may help in this case too but you said you see bubbles coming into the needle valve in the carb... you could have a fuel line leaking air ( or sucking air) into the line between the tank and pump that could cause the temp lack of fuel to the carb at times...

I will keep an open mind and consider all possibilities , I will say that any rust pin hole is highly un likely, Not even surface rust on anything on the car . the fuel pump looks new and pumps and holds pressure and suction on the bench. The vented gas cap looks new and the vent is open.
Last night I ran the car up to temp. and let it run for a while. I shut it off and removed the top from carb to see what was going on and found a full bowl. Now with the motor off I will say the you can burn your finger touching the carb near the base plate. and I watched the fuel in the bowl with a flash light and see little bubbles streaming up from the bottom like Ginger ale soda. Then I pressed the float down and there was plenty of fizzy fuel pressure trying to spit into the bowl. My thoughts so far are that the carb base is no hotter than its ever been since 1972, but too hot for running on modern fairy juice ?? I am reading all this about the new gas boiling at much lower temps. My 71 mustang with same motor has a hard plastic spacer plate under the carb , this is just attached directly.   

Rockatansky wrote: most intakes have a heat channel in the carb pad, if somebody removed the under carb EGR plate and set the carb down on the manifold that could explain something?

Ditto, if I wasn't sure the reason and wanted to replace something, that would be a good try.

If nothing else , at least if you break down in a 72 GTS you look good doing it, : )

My car does not have any kind of spacer under the carb, Just an exhaust type gasket like you say first on the manifold, then a thin sheet of stainless steel, then a paper gasket on top. I found the exhaust port that runs under the carb is blocked solid with rock hard carbon. I plan to leave it that way. I purchased a two pack of the exact 1/4inch thick gasket you show which they also call an Insulator. and I bought a new metal infused thin exhaust gasket for under it. Thank you for the help. I will let everyone know how I make out. Probably in about 4 more days and it will be 80 degrees and I will have it back together so I will put it all to the test. I still plan on dropping the tank and doing a close up inspection of the sender and related parts. Thanks Again.

All there 2v spacers are advertised as holley 2300 and I was told they won't work on motorcraft 2100 series , I think maybe they wood but don't know.

Those are good thoughts, carburetors with very low fuel pressure is a recipe for vapor lock. The bad gas makes it more possible for sure.

So while waiting for my insulator gaskets to arrive, I removed the tank and found that the sock at the end of the pickup has been falling apart and there was chunks of it laying around inside the tank, The inside of the tank is otherwise very clean. Maybe a little pc got sucked up into the fuel pump inlet and is causing a problem with flow at times ?? I'll blow out the line and maybe consider changing the fuel pump just to be sure.

pictures of sock in fuel and a washer looking thing that was in the tank

  Glad to see you are up and running.

Very nice