Flywheel for the year of your engine, clutch, pressure plate, throwout bearing, shorter front driveshaft, longer rear driveshaft, pedal assembly. Now I went with a mech clutch, because that was what the donor had. For a mech clutch, you'll need a mech bellhousing and clutch fork, linkage and matching pedal, I'll try to get pics of mine in a few days so you know what to look for. For a hydro clutch, you'll need a master and slave cylinder, plumbing, and a hydro bellhousing. I'm not exactly sure what the difference is in the bellhousing, but they are different part numbers. I mixed and matched parts; engine was 350 in my 90 Burb, flywheel was out of an 86 GM p/u, front driveshaft,pressure plate and clutch plate out of a 76 p/u that the tranny was in, the pedal assembly from a 72 p/u, and the rear driveshaft was an unknown from the salvage yard I had modified to work.