Later 727 in '64 B-body-What OEM driveshaft to use

OK guys;it's looking like I'll have to replace the trans in the '64.:yes: The cost to rebuild it would rival the cost of a good aftermarket unit and I was planning on going to a later style unit anyway. My question: What driveshaft should I look for,as far as an OEM unit? It's got a 489 c.s. with stock(7260?) yoke in there now,and I'll probably just run a matching yoke on the back of the trans-for now. I'll upgrade to bigger yokes/u-joints later;I just want to try to drive this girl THIS YEAR!!!!!!! As always-THANK YOU!

'65 727 shaft. But keep in mind the mount location moved on the trans. The crossmember will need a mod. Ask me how I know.....