Note: this method works just as well with any L6 engine (regardless of brand, age or size) with the common 1-5-3-6-2-4 firing order.
Note: the stovebolt (and many other L6 OHV and side-valve engines) has its valves positioned as follows (from the front):
Exhaust - Intake - Intake - Exhaust - Exhaust - Intake - Intake - Exhaust - Exhaust - Intake - Intake - Exhaust