67 vs 68 ralley dash frame(Any difference ?)

I am changing out my dash assy in my 68 Valiant to a ralley dash, Can anyone tell me if there is a difference in a 67 frame vs the 68? I know the dash pad is slightly different but I'm not sure if the frames are the same. Help please!
Thanks Mike
the 68 will have both the top and bottom pad holes, as well as I believe the radio cut outs may be slightly different as the 67 had round knobs and 68 had thumb wheel