This kit is used to rebuild or overhaul 4 barrel Rochester 4GC model carburetors. 1965 Checker 327 engine with vac governor. 1965 Studebaker 283 engines. Rochester OEMs that fit this kit include We replenish our kits on a frequent basis so you do not need to worry about receiving a kit that has been sitting on a shelf for years drying out the component parts & gaskets.