So the bell housing is from from Ford Racing. But from the guy who sold it to me to the guy that did the work on it said to make sure I align the bell housing. Tremec has a tolerance of .005. Michael its a tko 600. You told me Marshal aligned yours and it was out too. I did not spend all this money for an upgrade to not do everything I can to make it last. TTW just did a tko 600 for some old cmc car and they needed offests too.