How do I stop vapor lock?

The car was running good, then like it was starving for fuel again, when warm, it would run prob 20 miles without a prob, then just like die, and start again a second or two later. I pulled into a gas station, pulled the fuel line at the pump, delivery side, and a blast of gaseous air came gushing out! Then it dribbled fuel. I figured that was the vapor lock "unlocking".

So I put it back together, drove it, in the cool of the evening, 40 more miles with no hick-ups.

I have to check to see if there is a return line on my sending unit that is non-operational. The car ran great for years just the way it is, but I seldom drove it over long periods like I have been lately. I figure it's getting hotter than it has before, even though I have a 160 thermostat in it. And it's not even summer!! Yikes!

I hope there is a return line I can hook up. But, what kind of return line do you use? Like put a rubber 1/4" fuel line coming from the small port on the filter to the port on the sending unit with a 1/4" steel line between them?

Thanks, that will probably solve the issue. If not, I'll let you know.