Yep , 1972-74 E body AM FMs are knob style.
1970 E body AM FM was a thumbwheel Phillips # 2884658.
1971 E body AM FM was a thumbwheel Motorola # 3501050 and has a cassette lead.

http://wardsclassiccarradiorepair.com/id15.html

Greg


gregward@mchsi.com phone 256-852-0955