Overheating during cam break in - help

Crank that timing up.... I run my 360 23 at idle and 35 all in by 2000rpm
Dont go over 34 unless you kno what your listning for
But sounds like you need more timing, if its retarted too much it will shoot fire down the headders and head up the water jackets in the head

If you already got timing square and still hott
Check clutch fan, or water pump (flowkooler pumps kick ***)