I overheated my 94 90cs and warped both heads,after having them pressure tested they where both shaved the extreme of the two had 15 thousands removed, I was later in formed that this may be too much, The heads where never cut before.

Can anyone tell me the min deck height allowed, or needed clearence between piston brow and exhaust valve.

Thanks

machined edge surface (where the valve cover seats) is 132.75 mm (5.226 inches).