R1600 Head Stuff

[Robert.Long@CSDInc.com]

Hi,

I just had the head from my 1600 milled.  It mic-ed to 3.175.  What is the
minimum?

I assume this is below tolerance, because I put it back on, without the
gasket, and finger tightened the
head bolts, and the pistons are making contact, when I manually crank it.

Is there anything I can do to save this head?  It's in pretty good shape,
minimal pitting, valves look good.

What about a shim, or double gasket? 

Thanks for your ideas - Robert Long - 67.5 headless 1600 - Albuquerque, NM