It is in 10 ft-lb incremens to 105 ft-lbs.
If you use the Fel-Pro blue head gasket (recommended by me) the torque will be printed on the lable.
The old Boss 351 Reinz gasket required 125 lb-lbs to crush it to the correct compressed thickness.
The rates are for oiled threads (30 weight oil). I'd clean the the threads in the block with a tap and use new head bolts.
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