eddy performer probs and question

put a used 600 performer on a mildy cammed 318. occasionally gas will come out of the tube beside the hole for the metering rods on the left side top of carb. would this be caused by the float level. carb is clean inside have not checked the float. it also surges at low speeds and sometimes acts like its gonna quit idleing. and last is there any way to make the secondaries come in sooner? thanks