Afew things i have picked with regards to the 2.0 into 1.6 conversion from talking to a couple of people.
The 1.6 and 2.0 have the same mounting points for block to transmission.
You will need to fab custom mounts as the 2.0/1.8 Kick had a chassis 60mm wider.
If you are using an auto you will need the torque converter and flex plate from the 2.0 and the 2.0 has an 8 bolt crank that will require machining and shimming to mate up.
Here's the link to an install in a Sammy
http://members.cox.net/aftermarket4x4/2liter.htmlContact Brent a call at Trail Tough as he does the kit for the Sammi and is pretty helpful.
http://www.trailtough.com/The J20A engine has had slight variations in its output
94kW |removethispart|@ 6000rpm, 174NM |removethispart|@ 2900rpm
94kW |removethispart|@ 5900rpm, 174Nm |removethispart|@ 4300rpm
97kW |removethispart|@ 6000rpm, 166Nm |removethispart|@3000rpm
103kW |removethispart|@ 6000rpm, 193Nm |removethispart|@ 4000rpm (Japanese Market)
Bore x Stroke: 84mm x 90mm
Capacity: 1995cc
Comp. ratio: 9.3:1
Given these specs it's it's not so much a high revver as a torquer. Have a look here at a graph.
http://daniels.lumena.com/suzuki/Images/J20_1.jpg