Check out this diagram I got from response to my parts needed on another forum. Pretty useful for all of us I should think. I can e-mail the original if you need since it is much clearer.
Pascal, anyway to check PN's on the 72 vs 73. I see parts in the PY and Ames books up to 72 for the Custom Sport Wheel, they look the same but it would be nice to know for sure.
I have a Custom sport wheel but no parts to install it yet.
Sorry I can't help you there, my book is a service manual so it doesn't list the parts numbers, maybe canadianroundport has something in the parts books he just bought from Carl ?