Out of curiosity I looked up the ratios for the mentioned 4L60 transmission: 1st is 3.059:1, 2nd is 1.625:1, 3rd is direct drive at 1.00:1 and 4th is overdrive at 0.696:1. Then you'll have the ratio in your rear differential, whatever that happens to be.
My high school car was a 1975 Impala with the 350 cubic inch small block V8. Because of the Malaise Era emissions laws, it only produced 145hp but still had decent torque at 250ft·lb. It had a huge amount of space under the hood so perhaps this could fit both the motor and battery in there? (F/R weight balance being ignored)
Your point about people comparing this against the LS crate motor is correct IMO. This will be an expensive low-volume kit until (if!) economies of scale kick in. Only bought by people who want something different to show off to their friends at the weekend car shows.
No worries at all and I should have been clearer that I wasn't saying it was just as good, more that it wasn't "Oh well, 200hp" like a ICE engine. I also think raw horsepower is overrated in street driving. As a single data point, a couple of weeks ago I got to run three laps in a GTR "Godzilla" at Loudon on the interior track. It was a blast but after I'd come down off the high I realized that 585hp did not feel wildly different from the ~400hp in my Camaro. And I rarely get to use much of that (other than some of those lovely overly long onramps around here).