If it has 2 U bolts on each side then you need to replace the inner one with studs (if going back original)...
Do you want to sell the traction bars? If so could you email a pic of them to me?
I would be happy to sell them to you. Is there an inner and an outter U-bolt? I've looked at some pictures and noticed that the shock bracket bolts on the inside (meaning closer to the diff) and there is one U-bolt on the outter closer to the shock. Attached is a photo with the bars on my car and another photo of what I thought it should look like.