They say a picture is worth a thousand word's, heres my 64 dart convertable with slant six k frame and v-8 from 64 barracuda donor car, as was stated I was curious and installed the manifolds in a matter of minutes....have no idea why I took pic's but here they are......of course I need to install the manual steering box now. and I am using stock v-8 mounts so they must fit onto the slant six k frame??? seriously...why would I say they fit if they dont fit?or that the k frames are the same??? maybe you have the mounts on the engine in the wrong location? front of the engine mounting bosses instead of on the rear? but as the pic's show They Do Fit.....Magically :cheers: