Is this a good deal?

Hey all. I just came accross a 65'ish belvader(sp) at a locol scrap yard. After a closer look I discovered it has a 8 3/4 rear. I asked the owner if he would part the car out. I my delite he said sure and asked what I wanted. I told him the rear from tire to tire. It has BBP so I would need the wheels to get started. He said that it would not be cheap. I ask "well, how much?" to my suprise he said $125. I told him I would have to think about it and will let him know. I did not want to act like wanted it to bad.
Now I have wife's promission to get it but beter not ask for anyhing for a while B/C my 5 year project is getting out of control and I have only had it a few months.
I did not get any casting numbers or measure it yet. Does any one know if it will fit my 71 swinger without cutting? I will go there tommorow if have time and measure and try to see the numbers. where would I look?
Thanks for any help.
Jeff