The 22R-E won't win any land speed records but it gets the job done. The engine was rated at about 115 HP and 135 lb-ft at speed level.
The main problem I think American drivers have to overcome is not revving it enough and driving them like a V8. They are fine running 4000 RPM for a while climbing a grade, you can't expect it to work just lugging along at 2500 RPM. They'll pull you along on flat without much head wind at 75 MPH but since it needs RPM you mileage will suffer.
This one is built slightly with better fuel injection, aftermarket ignition and a header. So it might make a few more HP. Nothing drastic, though.
Depending on what transmission they put in, maybe a W56, maybe a G5x, it'll have a respectable first and slight overdrive. The G5x series had 3.93:1 1st and teh W56 3.95:1. Both are 0.85:1 5th. The W series is plenty strong but the G52 & G54 benefit from being upgraded by Marlin to a heavy duty, which he remans with a larger input bearing.