Well, from what I know the build log for Angus' BRAT conversion is over on the Openinverter forums. I know for sure that you don't need a clutch, since neither of us use one, instead there's a steel coupler which mates onto the output shaft of the motor and uses the spline from the clutch to mate into the transmission, so the major sticking point here would be the strength of the weld holding the clutch spline onto the coupler. As to the end weight, I can't speak to how much that one weighs, but due to the differences between the two builds that feels immaterial. Really the only thing we share between the two builds is the motor, he's using battery modules from a Tesla Model 3 whereas I'm reusing the pack I pulled from the Leaf, and I'm pretty sure he's using different control electronics to send commands to the motor. But from my own research and some guesstimation, I would say that his conversion probably weighs somewhere in the range of 2500-2600lbs, and once it's done mine should be pretty similar, since the car's base weight is slightly lighter but my battery is a bit heavier as well.