1949-54 Chevrolet bellhousing. Part #3688001. Dated K-16-0 (Nov 16th 1950). This is in good shape, needs to be degreased. THIS FITS THE STOCK ENGINE AND TRANSMISSION FOR THESE YEARS ONLY. ** Please note the transmission mounting, we have been told there are different ones. ** Top holes are 3 11/16” on center and bottom are 5 13/16” on center INV: Nov121p