Non A-body question.
You may have an A-999 trans in that Dip which would be a good trans to have around. If nothing else, you could pirate the lower gearset and input shaft out of it to wake up a 904 trans. The brake stuff probably will not work for an early A body, at least not unless you are going to change to all large bolt pattern. Even then I'm not sure if it will interchange. The rearend will definetly not be a bolt in and will probably not be worth the $$$ to make it fit. There are many other options available for rearends to use the one from the Dip. If it was cheap enough, you may want to snag it, but if it were me, I would just buy the 2 motors and the trans. Good luck with your 65, and if you need some parts for that, post your needs here. I just stopped and looked at a 65 and 66 parts car today!! Geof