Hello all, I currently am gathering parts to install a 69 th400 short shaft (From a Pontiac I believe, trans has PW on serial tag) to replace my st300 which is leaking fluid all over the place. My questions are, will the st300 cross member work with the th400? Will i have to cut my drive shaft even though i have a short tail trans? I am told to get a th400 yolk from a 73-77 Grand Prix. what kind of speedo gear should i get for the stock 10 bolt 2.73 rear end? I also want to install a floor shifter. I am looking at the Hurst Pro matic 2 but can't decide to get the regular one or the Longer truck version due to the fact that i have bench seats and might be farther away from the shifter. (Car right now is a Column shift) Fire away. ---------- Post added at 11:09 PM ---------- Previous post was at 11:08 PM ---------- Can I also use my existing trans lines?