If you have the later 145 with the one peice windows then it would be hard to add the two peice type. That center divider is part of the body, not a bolt in add on.

If you insist on trying it it would be posable to cut tha section out and weld it in a newer body, but it might be easier and neater to just rebuild the parts car with your parts.

For the record I feel like the later style looks a lot neater and cleaner, but I sure like the airflow with the vent windows.

If you give up on the idea let me know. My '69 145 got severly smacked in the right quarter panel and even though I was able to transplant a'76 panel I had to make do with plexiglass for the side windows.