I have a 14 bolt in an 87van (pretty sure has seven bolts visible below the gas tank). . . I have someone offering me $750 for the van. I noticed on the trim tag in the glove box that it has a G80 option. In my experience that means posi, right?? I am debating parting the van or selling it. What should I do?? What kind of value does the posi have in this rear? I am not sure what the gear ratio is but it is a 12 pass van with 8 lug axles and a 350/ turbo 400 trans. Give me your oppinions . . . I need amo for my wife so that I can convence her to let me keep it and part it out.