I'm new on this forum and looking for a little help from the Buick society. I purchased a posi 3rd member and gear set from a guy who fooled me into thinking it would fit in my 63 Pontiac. I was recently told it may belong to a Buick and will not work in my car. I'm trying to get confirmation of that and as much info as I can so when I resell this unit I'm not lying to anybody. Can anybody help me out? Thanks
