Those guys at ATI seem clueless as to what the problem is. I've narrowed it down to the bolt on bellhousing. The flywheel and spacer they give you to use puts the flywheel out 1.5" off the back of the block. When the converter is in the trans all I have is 3/4" from the converter to end of the bellhousing. So its not going to bolt up to the block with only 3/4" clearance we are missing 3/4" to 1" off the front of the bell housing for some reason. I even bolted up his bellhousing to my powerglide case and its the same problem. There shouldn't be any difference in depth between the big block bellhousing and the small block one but for some reason there is. They said they are looking into it but we havent heard anything back from them and we dont know anyone with a small block mopar thats running one of these ATI Supercases.