You should be able to just oblong the 4 holes that bolt crossmember to car,, yours looks very beefy ....your upper trans mount looks different also ,,mine have all been flat ..like this picture but the trans would bolt where plate is..
This is not a 5speed ,,,,,,just showing difference in our brackets your dogleg should bolt right where plate bolts on..
(edit) i have done auto to dogleg swap in the past year, just not this car.