There is a lot going on in this photo.
Looks like the older girl is as happy to have the engine out as the guys. Maybe it's hers, or she's a budding mechanic? Yet another really cool pic!
How about five guys to deliver the baby engine and one woman to talk them through it with a student observing...
What is the happy lady holding in her right hand?
Looks like you could wring a quart or two of oil out of all these coveralls.