Possible cam install

I found this

For every .010 taken off the head surface if you would have .0123 taken off the intake side of the head you wouldn't have to touch the intake.

now lets say i shave the intake.

.0123 x 4= .0492 off the intake

Is that .0246 off each side or .0492 off each side of the intake

Or my other option is making my own gasket out of really thin material.

I looked all over for that spec and couldn`t find a thing.

If you can shave the head on the intake side, that would be the way to go if you can. Then you could use a different intake if you wanted or continue to use your present intake on other motors without any fit issues. You can still remove your heads and have them cut without replacing head gaskets as long as the engine hasn`t been fired.

As far as shaving the head or intake, you`d have to take that much off each side.