The LS1 V8 itself has been officially rated at anywhere from 305 to 350 horsepower, though aftermarket add-ons can push those power numbers significantly higher. The eBay auction doesn't mention the specific output of the LS1 motor in this Wrangler, nor very much about the vehicle at all, except that the transplanted engine resulted in a salvage title.
We imagine one could immediately bypass crawling rocks with this Wrangler and instead just jump them. At the moment, the high bid is $10,000 with 11 bids on record and about 5 days left to go.
Thanks for the tip, Jro!