For the tcase sending unit, get your sending unit and get a bushing that will screw into the tcase drain hole and let your sending unit screw directly ino that. Sticks down about 1 inch total, not bad. mine is a 1/8th thread and Mozarkid, thanks man, got me the bushing rom a hardware store near him...you might need to order it but its out there.
For the record, several people have driven these tcases at 60 and up mph for hours and have not had overheating problems...some like me do have this problem...many theorys abound as to why.
brute4c