Switching 1963 valiant wiper assy to 1965 questions

We did a "humpectomy" on jasons 1963 valiant with the 1965 parts car. Sheet metal part is done.




Now we are onto the wiper, pivots, motor and linkage. Here's where we hit a snag.

I was hoping to use the stainless steel bolt on 63 wipers and pivots, but they are substantially different than the 65 pieces. Here's some pics for reference.





So I guess our question is what parts can we mix and match?

Is there anyway to keep the 63 style arms?

Or am I better off finding some later model stainless arms? And if so, what inter changes with the 65?

Thank you in advance. Eric and Jason