Different than a '65 with the tiny consolette? Yes. It's dimensionally the same as the '67-76 except for a few options where they cut the front edge off for dash clearance. The shape of the hump doesn't really matter as the console sits on top of it. The width of the hump (tunnel) changed between '66 and the '67 up tunnels, and the 4 speeds got an extra side section for shifter clearance. '66 models are pretty much unique on the tunnel, 4 speed section, and the console brackets. The later brackets can be modified to fit however, if you know how to cut and weld.
