70 Swinger Vinyl Top

I am considering replacing the top on my 70 Swinger.
Legendary offers 2 styles/cuts
A Center Deck 38" and 45"
Their representative told me it was more of a personal preference.

Does anyone know which size came from the factory? Or did they come factory in both sizes?
The top on my car is not original so I cannot measure the one currently on my car.

Thanks
Matt