1965 valiant /6 to 340 a833 and 8 3/4 rear swap

Maybe it wasn't a cuda it was from, was a long time ago...

If that engine and trans is installed in the volare, shouldn't it work in the valiant?

Thanks again
Yep, A and F bodies used the same transmission tailshaft and shifter mounting points. I wasn't sure what mods you may have done to swap it into the Volare.
Oh, and you'll need a '66-'67 speedometer cable to hook the later transmission to your '65 speedometer.