The factory style head gaskets for the 301 had many of the coolant passages blocked off between the cylinder head and block. I assume this was done for emissions and fuel economy purposes as a hotter combustion chamber allows for more burning of emission gasses and a leaner fuel mixture.
Unfortunately, this additional heat does not work well in a turbo application. Especially one with out intercooling capabilities.
TTA Performance offers these modified Fel Pro head gaskets. We have added some additional coolant holes that will keep the combustion chambers a little cooler to help avoid detonation.
$70.00 pair (+shipping) TTA-017