Im not sure. I did not try to install the bolts I tried to install and noticed it was not going to slip into the backing plate so I just compared it to the old one and there was some differences so I box them up and took them back to the O'------. I am going to try to go to a Chevy Dealer ship and take the old one with me to see if they can cross the Casting #'s and see what they offer for a replacment $$.
Just wanted to pick some brains before I did this
Thanks to those who looked and responded
