I noticed the other day, while I was starting up the Plymouth, that the smell of gas was pretty pungent. The first thing I thought was the carburator, but ever since I installed the correct carburator I never had the flooding problem like with the previous. So I lifted the hood and checked the carb, but no sign of leakage. Then, through the bottom I saw gas leaking down at a steady drip. It looked as if it was coming from where the line went out or in, I couldn't tell, so I grabbed a wrench and started to tighten it, but it was already tightened and still leaking. I couldn't figure out where the leaking was coming from. So, I turned off the engine and went inside for a few minutes. Went back and started the engine up to see if I cold get a better look at the leak, but this time, no gas leaked out. I then drove the car down to my mechanic, but he had already closed. I got out to see if it was still leaking (with engine running), and it wasn't. When I got home, I checked it with the motor running and it still wasn't leaking.
My question would be why this leaking occured when I first started the car then stopped after I turned off the ignition and started it it back up moments later?
One thing I had in mind is that the pump on there now is an aftermarket one I bouth at Napa a couple of yeras ago for the '55 Plymouth 230 engine I had in there. Now, I have the '49 Dodge 230 engine in and we put the same pump back on it. Should it make a difference or is there a specific pump made to go with the '49 Dodge engine as opposed to the '55 Plymouth engine?