bottle jack method on a big block

yes, it should be plenty, or you can use the back mount adjusting bolts to raise and block the engine against the hull, remove the top nuts and use the bottem nuts to lift the engine and then block, normally me and another guy can lift the back of the engine and block. Remember to loosen thwe front pinch bolts so the mount will swivel. Hopefully you are also replacing the damper plate too, so you can stack wood underneath the manifolds on both sides to the stringers in order to remove the bellhousing, and i know your first thought was well the damper looks good....its not, look very,very close at it, where the springs meet the plate you'll see wear marks. I only use Sachs or Lipe damper plates in front of these transmissions. What is wrong with your trans? is it a 10-18 model? describe what the trans is doing and maybe we can give you an idea what may be wrong with it
   Eric

plus its dangerous, dont put any additives at all in it, especially with the shapes its in now. nothing will help
make sure you change the damper because when you put the trans in reverse it really loads the damper because of the plates also being stuck partially in forward