Gents, Picked up a '57 Cadillac recently that has a pretty good running stock 365. The Carb on it was not stock and was in desperate need of a rebuild so instead I did what everyone does...put an Edelbrock 4 barrel (1406/ 600cfm) carb on it. FYI: The tank is new and all fuel lines/filters are new. I'm getting two side effects that have me wondering wtf is going on... 1) Weird low sucking/moaning ( pretty loud) sound coming from the carb 2) An occasional backfire out of the exhaust at idle. Coupled with the fact that I am getting what looks like a trickle of fuel through the filter those things had me thinking that I had a fuel starvation issue. Anyway, when I pull the line at the carb inlet fuel SPRAYS OUT at pretty high pressure as you might expect in a vapor lock situation. What's weird is it'll do it before the motor heats up at all. The new lines traced the originals exactly and aren't anywhere close to a heat source. After pulling the fuel line at the inlet I had a friend crank the engine to check for fuel flow. Fuel pumped well and filled a water bottle in a matter of seconds. Any thoughts? I'm momentarily stumped. I have a new fuel pump sitting on the shelf that I'll probably throw in it just because I have it around, but I don't personally think that is the issue. Any help/ guidance is appreciated.