What is the differance between the 68 to 70 Charger Rallye dash frames besides the ignition switch? I have a 1968 Charger and the dash frame is rusted out along the windshield. I can get a dash frame from a 1970 Charger that has no rust. I know that the 70 has no hole in the frame for the ignition switch but can I just add the hole and bracket to the 70 dash for the ignition switch and then transfer everything from my 68 dash frame to the 70 dash frame?