Don't forget the shift linkage. You also need a hydraulic clutch line transmission and the one you are getting is most likely cable. Your wiring harness (in the Civic) will work best. Just make sure you have (at least) an OBD1 Distributor, Alternator. I would also make sure you have a complete OBD1 intake manifold too (with injectors and rails, TB, etc) Plus a OBD1 ECU for an LS motor.
But if its a 92-93 B18A....it will all be OBD1 already. And once you know everything on the long block is OBD1 compliant, your harness in the hatch will plug right up.
I suggest you look into new b series axles or at least re-build before you install them. New timing belt, tensioner, water pump...blah blah blah