Are all the flexplates for the LS series the same as far as the ring gear and crankshaft bolt pattern? I have one that I think came from a Corvette as it had a splined part bolted to the center. I just needed the plate with the ring gear on it and so I unbolted the center and ground off the rivets to get that part off. What other installations use a flexplate that doesn't have that center part on them? I am wondering what to search for on ebay.