1992 Honda Prelude stretchbolt replacement

I was switching heads on my 92 prelude si
Do I need to replace the head bolts with new ones or can I reuse the ones that I took out. I don't know how to tell if the bolts that were in the engine were stretch bolts or not or if they need to be replaced.
I have asked a few mechanics and I have received answers to replace them by some and not to replace them by some