In the world of MOW prototypes, of course this arrangement is 'correct'! Equipment was evolutionary from cast-offs, from the creative minds of shop workers, designs documented perhaps from a sketch on a lunchbox napkin, ...even a job I'd have probably done for the halibut just because it sounds like FUN!!!
Aside from specialized pieces...like cranes...I seriously doubt there was much market or catalog to sell from for MOW equipment 'back then'. Nowadays?...yeah, the stuff's getting pretty sophisticated, and often in the hands of whole travelling companies cleaning up disasters or making trackage repairs.
Hope you don't mind!?...I'm gonna borrow your idea myself!!