which fits your particular transmission 38 installation with manual transmission ... which will bolt directly to the stock mustang exhaust headpipes 67 header designed ... on right side 77 will not fit 1971-73 mustang/cougar with manual transmission 78 this ... 95 will not fit 1967 y-block engines 96 the header requires 1958 or later ... this header requires the use of 1969-70mustang 302 boss or 351 boss frame mount ...