How did you manage to crack your housing? Ive broken everything but housings. one time I took out my ring&pinion, carrier, driveline and cracked the 3rd. but never hurt my housing. (think healthy small block x 39.5 tsl's mixed with smoky burnout.)
I dont think that a u- bolt flip would do it but to fix it you may want to weld the crack then plate the underside with pipe just to be safe. Good luck
WT