floor shift knob??

[dutsuno]

k. me n the pops went to pomona CA over the weekend for the swapmeet and car show. found an OG steering wheel 4 $60, i thought that was an amazing deal. but thats not what this thread is about. i bought a shifter knob from the "truck shop". i have a 72 v8 350, 3 on the floor. the knob i was sold doesnt fit on the floor shifter???? i didnt see a different shift knob for my year so i assumed they wer the same size. is ther another knob 4 a floor shift????