Can a novice mechanic change a head gasket on a '72 Chevy 350?

Probably. Only the inline engines from that era would be more straight forward than that one. Have fun. As a licensed mechanic I would suggest doing three things before you proceed. Obtain the proper manual ,READ IT ,also make sure you have the proper tools, torque wrench ,timing light , feeler gauges eg. And last but not least, have someone you can call that does REALLY know what their doing in case you have problems. == Answer= i also suggest taking it to a car wash and clean it off very good with the pressure washer it makes life alot easier