Cooling issues

Best luck with it. What pressure cap are you running?
Big block in A body is always a cooling struggle.
I have not owned a Cold Case radiator but you can never underestimate to importance of blade placement, shroud and or clutch.
As I mentioned before, once I switched to aluminum 3 core with dual SPAL fans it changed everything.
Why stick with the old technology when you build and engine and trans and converter with upgraded components?
Cap is new 16 PSI... I will sort it out I am sure.....