Do you need to replace the head bolts when i change the head gaskets on a 90 Ford F150. I know you have to on a 3.8 but I have never heard that you have to on the 5.8.
It's always best to change them, but you can get a good idea if they are stretched by taking a small metal straight edge and laying it against the bolts if the threads are pulled you will see it.
Pitted rusted. Best way for bent lay on ground bench flat surface and roll it it will tell you straight away! And lay all
Bolts side by side if all the same use again...
you dont have to unless they are torque to yield bolts then you would have to change them
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