Do you have an LKQ scrap yard in your area or close? Transmissions are a flat fee - $44.95 their website is http://www.lkq.com/ check for your closest location The one closest to me in Orlando, always has an older Buick laying around where you can get one. You'll need to use your tranny pan though, cause they punch holes in them to drain all fluids. all the cars are nicely lined up, raised from the ground, and you have to pull the tranny yourself.
trans i have a 71 350 trans for 75.00 plus shipping i live in north alabama my name is steve call me at 2565349381 if interested thanks