Just checked my '73 manual... It has the same picture but shows <A> as 24 ft-lbs. In fact, it lists 24 ft-lbs as the spec for every engine, /6 on up. Maybe yours is a typo?
I found a similar typo in my '64 manual, calling for 200 ft-lbs instead of 200 in-lbs! Luckily the chart at the end of the section shows the correct torque. I guess Mopar couldn't afford proof-readers.
The lesson here is use common sense, and question when something doesn't seem right, just as KJoe did.