C-10 body droping question???

i like the crossmember, Know that will actually alow the truck to lay rockers on 22s with no cutting on frame or floor board. Also the traditional way is alot cheaper put you have make sure to measure and cut just right. And with how crappy my welds are, id be in trouble. LOL

It says it will lay a 29" tall tire with 3" drop spindles.