Will an 8 3/4 rear end fit in a 73 dart sport?

Ok we are going to keep the mounting pad on the rear end the same. We will keep the position of the leaf springs so we can have a wider tire without interference on the spring. We will get new springs and spacers and will redo the mounts and shackles. We will redo the welds and do what they did, but much better. Hopefully the rear end rebuild will fix our issue.