This is a New Head Gasket Set for IH engines:
Diesel: D166, D188
This set has all the gaskets and seals that touch the head.
This fits IH Tractor models:
I also have most all the other parts you may need. Check out my store for other IH parts. I have over 30 yrs. experience of rebuilding IH tractors and motors and have many parts available. Email your questions and I can probably help you. email@example.com