Just know that stock replacement head bolts are pretty inexpensive (like 40 bucks from Rock Auto). If you're building a new motor, I wouldn't skimp.

That being said, if it's not a torque to yield application, and they visually check out with no damage that would create a stress riser, you should be fine re-using them. Just thoroughly clean the threads and lube properly to get the correct torque reading.

Edit: Just checked Rock Auto. The no longer list LA bolts, but they've got Magnum-type (23 bucks).