no yoke needed. I got my driveshaft and yoke from a 87 mustang (AOD equipped), the driveline company told me to bring the driveshaft and they would change the u-joint flange (I think thats what its called) to match the 9 inch pinion yoke and supply the u-joints for $180. The measurements are taken from the rear of the transmission housing to the flat surface of the pinion yoke, submit them and the spit out a functioning shortened balanced driveshaft.
As for the spring perches are these the ones your referring to timothale?
Another guy said he used them on his 9 inch rear end.
Does the width of the leaf springs determine the the width of the perches I should order? Or is it one size fits all (9 inch) type of deal?