Stroker 318/398 supercharged

Hi, i from argentina, i have 398 supercharged dodge .....this is a good engine, but i have serius problems with the temperature.....we run on 8 psi of boost (root style) on a 8,5:1 compression.

Questions: What´s timing is good for my engine wiht gasoline 97.5 octane, and what's timing for acohol???

Thanks and sorry for my english