Howdy Back:
The only currently available composite head gaskets we have been able to get an measure are the Fel Pro, Corteco and Victor. The specs we have are manufactures thickness and compressed thickness.
FelPro .055" .050"
Victor (NAPA) .046" .044"
Corteco .057" .050"
We have not seen or been able to measure a McCord head gasket. Are they commonly available? Where from? If you have one, please report any manufactures specs. And/or measure it yourself and please post the info.
Sorry, That's all we have.
Adios, David