I would think any V8 trans would stand up to a reasonable amount of power. Looks like you're running a SBC, so i would suggest a TH 350 (or TH400 if you can find one for a small block...) for darn near indestructible, or if you prize fuel mileage a little more and don't mind backing down a little, a 700R4 (overdrive trans)
I've heard that the 700R4 isn't the best for towing, but as light as you are, i don't know if youd really stress it that much...
Those are both computer free in the earlier years (pre 92ish?) so you wont need anything fancy.
Hope i didn't misunderstand your question...
ME
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