You need a tranny, driveshaft, clutch, flywheel, clutch pedal, master cylinder, etc. Should have a blank on your firewall where the master cylinder goes. There were 3 manuals that came with the zx. I would get one from a turbo car if you can find it, or from an 81-83 car. Overdrive is I think .85 or .75 to 1, can't remember which. Your diff should be a 3.53 to one or something around there. Should work well with the overdrive. Just start piecing all the parts together, should be plug and play. ECU was different, but it still should work fine with the manual. You'll want to ditch it eventually if you really plan on getting a reliable 350-400 hp.