I was wondering if anyone could tell me what I need to buy for a yoke the car didn’t come with a yoke.

 

Best idea would be to contact a driveline shop to get the correct part. Other options would possibly be a dealership, they might still have access to the part. Last option would be used probably pretty interchangeable between a G Body (7.5 ring gear) , Camaro or a S10 pickup. I'm not sure if a 8.5 rear diff would used the same part.