Most engines that size. 30 to 40 thou cold. Best measured with a test Assembly with soft solder pieces set on top of the piston. Assemble, torque , rotate slowly a couple of times. Remove head and measure squished lead with a micrometer.
Closer without hitting the head is better for starting, fuel efficiency and clean combustion. In wedge head spark ignition engines. Keeping the quench area clearance tight will reduce the tendency of detonation/knock.