Hemi Swap Checklist

I bought the Barracuda without a drivetrain. I was going to put a Big Block in it and I had a Big Block 727 that would work with the floor shift setup so that is what I was going to use. But now since I'm changing directions and going GEN III Hemi I got to track down a small block low ratio 904. I haven't talked with Modern Muscle. Do they sell transmissions?