any info on subframe swap or body swap 1963 dart

Did this on a 1969 Barracuda....

That is a very brave undertaking

if its that rusty as well as hit its not worth fixing

You can't always put a value on a car. For all we know the 63 convertible was the OP's first car given to them by a beloved grandparent. If that was the case you would want to fix it too.

Good luck with the repairs