First, I forgot to mention that I was not sure on the unit conversions, sort of a long day yesterday and I did not take the time to validate my conversions.

Second, Yes, the heads are aluminum. I had not thought about the straightening. What temperature does your machinist use for the overnight heating?

Anyone know what alloy the heads are cast from?

Third, I did not think about a copper head gasket. Any idea on where to find one?

Thanks to all for you inputs.
Lee