Head Gasket,Cracked head or hole in piston

Thanks for the responses, will post compresson numbers

some more info
mid 12 sec 360 combo
10.5 - 1

there is no popping etc through carb
excessive fumes/smoke is not coloured ie not black ,white , blue
Pushrods spin nicely in my fingers

No contamination of either oil or water and is not over heating

Pretty soon I reckon I will be whipping the head off after double checking
all before

Thanks again

Benton