NEW Zenith model 28-228 replacement 1bbl carburetor made to replace Rochester 1bbl on Chevy/GMC 216/235/261 engines from 1932 thru 1959. All are Manual choke only!! Includes gasket For Chevrolet (not GMC) 1950-62 inline 6 cylinder engines: 216 cubic inch intake c-to-c = 2 11/16"...will fit. 216 cubic inch intake c-to-c = 2 11/16"...will fit. 235 and 261 cubic inch intake c-to-c = 2 15/16"....will not fit. carburetor will not physically fit 235 and 261 engines. Will also replace the Zenith 28/228 downdraft carburetors. Can replace the WE, W-1 & BB 1 barrel carburetors.