Whoa, there's a big difference! As Team Chevelle's radio guy, let me explain...
1970 "inner" knobs such as the tone control are actually in 2 groups. Malibu style sweep dash inner radio knobs DO NOT INTERCHANGE with SS type dashes or in your case the Monte Carlo dash. SS style dashboards/Monte dashboards have a different spacing. These require a knob that looks the same but in reality has longer plastic piece in the shaft part.
Therefore, you probably have a "Malibu type knob" and of course it isn't "reaching".
This has confused many people. Hope this helps.
Joe
[This message has been edited by Coppertop (edited 04-29-99).]