[Dustin Mustangs]

Our SPF MKIII has had this issue since it was new. Once it gets up to temp, if you let it sit for more than a couple of minutes, it struggles to start back up unless you let it fully cool down. We have found a rather annoying work around of leaving the hood open in this situation. It has a windsor/dart based 427 small block with a 850 mighty demon (phenolic spacer) and a rear mount electric pump with no return line. Headers are ceramic coated.

Is this vapor lock? Is it a common problem with these cars?? We are thinking about running a bypass style regulator to address this but are concerned the problem is in the float bowls and not in the fuel lines. Anybody been down this road before??? Looking for some ideas...