k this is my first supercharged engine and trying to work a bug out. 416 stroker motor Mr norms Paxton sn60 setup. Stock 72 340 manifold and 800cfm thermoquad ( I know maybe underkill for everything else it’s got but it s all there to accept the vintage mr norms Paxton setup) Full msd ignition system. Holley 12-920 fuel pump with boost referenced regulator Plenty of fuel and spark It will not fire with the clamshell on top of the carb (or carb box) sealed up. ONLY WHEN IT SITS LONG ENOUGH FOR COOL DOWN a.k.a overnight It will instantly fire tho when you remove the lid. And will fire right back up when it’s warmed up. Any suggestions would be great. Thanks in advance.