I’m having a rough time getting an Airbox on my carburators. The Airbox I bought says “HM CB750F-F”, and the Airbox boots are “#73-0138” from vintagecb750 supposedly for the CB750A 77-78. I can’t get the boots in the Airbox and it looks like they’re too big to fit anyways. Do I have the right parts? If not what are they and where can I find them exactly?