Mine is a 67 - but it's fully documented on the mini tub and the de-humping . . .
Here's how I modified my line to fit the support ( oh, my cat is a convertible too )
Here's the doodling on the rear attachment point that I did:
Here's how I modified my line to fit the support ( oh, my cat is a convertible too )
Here's the doodling on the rear attachment point that I did: