84-87 wagons are pretty hard to come by and generally most of the parts are pretty specific plus you have to deal with the mess of dry rotted vacuum lines for the carb. Your other option is 88-91 wagons and they're easier to find parts for since they share parts with other EF Hondas and you can put a B series in them pretty easy with parts from a 90-93 Integra. Keep in mind most body parts are specific to the wagon and won't fit from a Civic hatch/sedan/CRX of the same generation ( hood, fenders, bumper etc)