Dave, Ken and Chip are a little more informed than most of us down to earth bolters.
The stock GM Hydramatic that will bolt right up to your 270 is fully capable of handling the HP and torque you can get out of that engine. The old Hydramatic was used in pickups, big trucks, bigger military trucks and tanks.

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!