Did the 3.0L Vulcan engine found in the 1994 Ranger have torque-to-yield head bolts or were they "standard" head bolts?

I am trying to help a friend with his "beater" truck and have a question concerning the head bolts.

Did the 3.0L Vulcan engine found in the 1994 Ranger have torque-to-yield head bolts or were they "standard" head bolts? What I am trying to find out is it really necessary to replace the existing bolts since it is just a "beater"?

Also, could you provide the torque specifications for both cases?

Thank you in advance for your reply. You have always been so helpful in the past.