I have mine made with a new molly tube and rockwell solid ujoints. I am not sure about your power out put, but mine was 785 hp and 690 tq. Never had a problem. Balanced and with new parts it was under 300 and well worth it. Another thing to do is to paint lines on your drive shaft so you can see if it is twisting on you under hard exelleration. Handy when racing. I was 60 footing my 3780 lb 72 cuda at 1.29. It only ran a 9.72 but I thought that was very good for a street car with slicks bolted on. But I also ran a ladder bar set up and a dana.