I use stock fan, stock shroud flowcool(changed from stock when it went out) waterpump.....after all the fillers were corrected , installed and I took off the 'extra electric pusher" fan prev owner had installed (obviously he had heat problems) I gained 15F...to get down from 225-230 normal running in Texas August...it ran 200-205...no problems , but before we cruised to Estes Park (in an August)I changed out radiator to a bigger one , aluminum ,and now car runs almost too cold in winter...166-170, but 190 -195 in summer