Hi guys,

Finally got the 508 in the road runner and am now trying to determine a slight over heating issue.. I have a 26" 3 core champion radiators with 440source pump, housing on front and 185 stat..

Car keeps cool at first start up and while on cruising on highway, will keep cool, but when doing stop and go traffic, starts to heat up and will overheat ( has not yet)
A few and questions

Engine is breaking in has about 75 miles on it ( just a baby)
I will check heat with heat gun at spots
I suspect 440source pump, will my old cast iron one work better?

Thanks guys,