LSX user

Issue: Trans selection. I want to install an LSX engine in a 2012 Mustang. Do I need an aftermarket K member(BMR)? Adjustable motor mounts? Tremec trans type? The position of the engine block will have a huge impact on the trans shifter location. The difference in shifter location between a T52 Magnum (Chevy) and the Ford 3650 type is about 9"! T56 is 26.4"and the 3650 Ford Magnum XL is 34.9"from the back of the engine block. It is a one positon shifter type trans. The other has 3 shifter positions to choose from. I know this isn't a popular swap but any ideas might help figure this one out. I'd like to keep the stock shifter location. Using a Ford 3650 behind the LSX is extra $$. Would rather not do this. Lots of rework. Any thoughts?