cooling help

Hello ,
I have a 70 challenger rt ,383 ,4 speed , 70k orig miles ,all orig .Heater delete car .
redone motor ,stock manifolds etc , block flushed , orig radiator redone , new water pump , tried 180 thermostat , tried without ,orig clutch fan etc. no money spared .
it wants to run on the way hotter side of the gauge ?
should i consider a new alum , 4 row radiator or ? Been fighting it for a while .
any help is awesome ?
thanks hp