There was a run of casting with the wedge style mounting ears.It was someones bright idea that the hemi could be bolted into any chassis with wedge k-member.It created a nightmare for any type of header application and most who had one cut the wedge mount casting off.The other issue is depending on the casting date and block serial number,most of these blocks fell in to that catagory of "junk"blocks that wouldn't hold demension after heat cycling.They were sold as "machine shop rejects" and were offered for $400.Many found their way to swapmeets.Check back in the archives and you will find mopar part outlets that offered them for $900 at the time.We had some that we returned for refund.