Will an 8 3/4 from a 69 belvedere fit an a body?

Just ran across a 69 belverdere wagon in the wrecking yard with an 8 3/4 in it. I know a Belverdere is a B body so my question is will the 8 3/4 from a 69 belverdere wagon fit in an A body without modification. If narrowing is in order pulling this one will be a waste of time as I already have 2 from c bodies that I could have narrowed. Just wondering if I could save some money by getting this one if it is a direct fit.