Hi, got a blown HG on my DB daily driver. Need the car for work monday so am going to try and bust the job out today. Im getting ready to pull the head, replace the gasket, and inspect the head for warpage.

Question i have is whats the max allowable difference in thousands across the surface of the head? I dont have a helms manual sorry and couldnt find the info i needed on ht. If its outside spec of course im going to have it machined but if i can get away without it i could have my car for work monday