do your vortech sc.. overheat...when u get on it ...like in a autocross or highway high rpm ....91 fox 5.0 stock block, win jr iron heads, vortec sc 15 psi....do they just run hott or overheat when on boost ...180 stant super-stat, northern alum 2 row 1 inch rad, black magic extreme fan, 16 lbs rad cap, high flow eld waterpump, new air dam, plus water wetter ..... i think, i got good cooling stuff .....