Hey guys. I have a question.

I have a SBC 350. It is the HO engine GM offered a couple of years ago (non-vortec heads). It is installed in my '67 Camaro and was the result of an engine swap from a 230 inline 6.

The engine runs hot when the temp is above 75 and I am sitting at idle. Once I get going again, the temp come down again and things are OK.

I have a brand new four core radiator, fixed fan w/appropriate shrowd for a SBC camaro.

I am running a little less than 50/50 mix on antifreeze/water...bias towards the water.

This is not a wild engine and I thought I addressed all of the basics. Any suggestions? This is getting really frustrating.