How hot before heads warp - L83

[gofast321]

I have an L83 with about 60k miles on it. I just completed a DOD delete. After I put the engine back together I attempted to get the cooling system to purge but I couldn't. I ran it a few times in the driveway and on my street reaching temps up to about 240-250 before shutting it off. Each time it was run for about 15 minutes.

After looking a little closer I realized I installed the head gaskets backwards like an idiot. So the coolant wasn't able to circulate and the heads weren't getting any coolant. I'm going to tear it back down this weekend to replace the head gaskets but my question is, should I be concerned that I warped the heads?


Thanks for the help.

Chad