Overheating during cam break in - help

coolant low could be a head gasket, I mean where would it go if it didnt puke it out? popping could mean a valve is getting hung up or more likely you got a wire crossed, check 5-7. itll run decent at 2-3K on a crossed plug wire but wont idle for ****. Running hot could also be running lean. Are your floats set up correctly? Should just dribble out sight plugs when running (terrible way to check but thats the way). And take that Holley replacement carb! New is always better than defective. Hard to set idle when breaking in but you should be at about 34 BTDC at 2500, and then just let it return to wherever at idle. Get a timing light: beg-borrow-steal, then give back....