8.8 swap

Hey guys. so went through a few pages of this, watched a few youtube videos but i hear different answers. sorry if i looked over it anywhere in this thread but ive heard both that you have to narrow and you dont have to for a 8.8 into a 72 duster. it seems like the 72 is kinda the bastard year for some things. either way its my favorite. ive been trying to find a 8 3/4 in my area but can only find B C and E ones mostly. have not found a A body one. so thats why im kinda leaning towards a 8.8