New Dana 60 Help please

Your yoke is fine.
As for a drive shaft you could get one out of a b-body and have it cut down or it as matter fact you could even get one from an a body that has an 8 3/4 and use that. You'll still have to cut it down to fit. The front of the Dana sticks out further than the eight and three-quarter an the seven and a quarter not a lot just enough that you need to cut the drive shaft and fit it to the car.