From what I've been reading and the pics I looked at, they are head bolts and need to be torqued. I'm sure someone will correct me if I'm wrong.
Headbolts are 65-70ft/lbs, studnuts are 55-60ft/lbs. Retorque after 20-30min of warmup, engine warm.
Torque Spec. sheet:
http://www.ntractorclub.com/howtos/pdfs/Tractor_Engine_Torque_Specs.pdf
Headbolts are 65-70ft/lbs, studnuts are 55-60ft/lbs. Retorque after 20-30min of warmup, engine warm.
Torque Spec. sheet:
http://www.ntractorclub.com/howtos/pdfs/Tractor_Engine_Torque_Specs.pdf