Pretty much none.
The 1.6 8-valve and 16-valve G16 engine can also be found in some Suzuki and Geo cars mounted transversely. Although there is a post somewhere detailing exactly which models have this engine, the location of this info escapes me right now. Somebody know what cars had the G16??
I know that you have to inspect the 1.6 engines in some Geos as they are not Suzuki engines, so look carefully before buying what you think might be a G16 in a Geo car!
The closest you will get outside of a Suzuki 1.6 block (8 or 16-valve) is the Suzuki 1.8 and 2.0 engines. Details on how to do those swaps can be found at
http://members.cox.net/aftermarket4x4/I have not read these articles in a while but they may be done using the associated vehicle's transmission meaning that, although the transplant is fairly easy, it requires the use of the donor truck's transmission, too.
Because these engines are late models, you may have a tough time finding them too.
Lastly, you can transplant a VW Diesel... Oh wait, you said "on the Cheap"... The VW Diesel may be a bit more expensive to swap, but the torque and the gas mileage is spectacular!
