ClassicCar

For those who don't know, Hudson heads come from the factory at 2.00" thick. The recommended maximum material to remove is .060", leaving a head that is 1.940" thick. I've successfully run an aluminum head shaved to 1.935, but at that thickness I had one or two spark plugs that had to be spaced up a bit to clear the exhaust valve. Keep in mind that many heads requiring that kind of shave are warped, so getting the deck surface flat again required removal of more material at some spots that at others. A quick search of related threads here will also reveal various opinions on the type of head gasket to use when heads are shaved that far... especially the factory aluminum ones.