Weeeellllllll......all I could find is that the CR is 8.4:1, and the cam is different.
160HP 145HP
244* Vs 240* Intake.....and
244* Vs 236* Exhaust.
It says the compressed head gasket thickness is 0.022".
Oil pressure is 45 to 60 psi @ 1,000 rpm.
It also says the head is made from Chrome alloy cast iron.
This manual is from 1967.