Not sure who you asked but it wasn't me. We do have access to some GM 4L based transmissions that can bolt to a small block. Will gladly price it out if interested. Email or pm me.
For reference, with. 727, 3.91's steel bumpers, and mickey Thompson radials, and a good converter,, my dart ran 12.10's with the IRON HEADED blueprint 408. The aluminum headed engine has 100 more hp, roller cam, and valvetrain, and shaves 50 lbs. Easily deep into the 11's with the right setup.