And this is EXACTLY how it should NOT be done.i miss the good old days where i would pull a D2 into the shop at 8am for headgaskets and drive it to lunch at noon all done. heads still warm when they come off.
Engine must be overnight cold or close to it for this job. Otherwise the heads WILL warp.
You can argue about it ad nauseam, but it's a matter of either being lucky (right away) and having to pull the heads 30-40k sooner for a repeat head gasket job.