Overheating issues with remanufactured 360

Sounds like you need to decide what you want then make a plan , oriellys rebuild and performance just don't mix , crazy heads and cam and a bottom end that is probably sub oem standard makes no sense . I f you want a reliable driver 9.5 compression , Comp xe 268 or xe 262 , Air gap , Holley 670 street avenger 3:55 gears and a 2200 stall converter . Car will be quick and dead reliable .
I don't know why the overheating , might be the shroud blocking to much of the rad , fans not enough , the stock rad with an added core , shroud and a good fan should keep it cool , mine runs cool in 100 degree heat sitting in traffic or cruising on the highway , mild 340 running in the high 12's