1930 Cabriolet blowing white smoke from exhaust

[McCoart]

Good Morning. Started my father's Model A and let it run for a couple minutes and saw from the exhaust the white smoke that led me to believe a head gasket problem Turned it off and noticed some leaks of antifreeze coming from one of the middle bolts off the head.. Not much of a leak and started it up again and same exhaust discharge but not much of a leak from bolt. Do you guys or gals think I have a blown head gasket? Thank you. Tom