complete trans where to buy.........

I would let my local trans guy do the build for me since I have no knowledge of building transmissions. Take for instance I had a 383 big block (pretty strong engine) with a rebuilt 727 trans. I talked to my transmission guy and told him it will need to beefed up. He beefed it up for me I never had any problems. Now there thousands of different components that is needed to have a strong trans. I would assume the components you need is based on how much HP you going to put through the trans. I would imagine there can be lots of money sunk into a trans but I would like to mention the torque converter will need to be built for your application. I would try to avoid the off the shelf converter.

Now if I was going to buy a trans already built I would go with fishy68 recommendation. Fishy knows transmissions.