I think my fuel pump is not putting out enough fuel. I put on a Edelbrock 1406 with off road seats and under a long full throttle pull it sputs & sputters. I also had it run out of fuel idling and have to choke it to get fuel back in the bowl. So my question is how do you test the fuel pressure? I have a vaccum guage but just haven't figured it out yet and I just know someone here could explain it. It has the mechanical pump.