Been done many times, biggest issue you will have is with the distributor, which mounts straight out of the cam housing and fouls the bulkhead. Fixes are...
1. Chopping a hole in your bulkhead, means removing Heater - Not so good.
2. Fitting an Adaptor
dgtuning
3. Using a Mazda 323 GTW Dizzy cap/modified rotor, it is tight but does fit apparently.
XFaktorNET
The better conversion if you are offroading is the Vitara 16v motor, due to being single cam and 1600 you get a better torque curve, the swift is a screamer in comparison.
Also the Vitara motor is inline the same as the samurai.
Food for thought.