just finished a swap ,, and idles for abotu 30+ mins and it would over heat... i've tried everything except runn it with out the thermostat..

Fan turns on,

radiator cap is off but I have a funnel ontop to top it off with more radiator fluid, but right when its in oper temp it would boil bubble up and overflow...??

new waterpump, new headgasket, timing belt, what else should i look into ??