try it, you'll like it!
If you are contemplating an engine swap, or have a swift with a dead motor... go electric! I finished one in March, and am really having a blast with it. I used a DC motor and 12 x 8v golf cart batteries. range is 40 miles-ish at average in-town speed around 35mph or so... This setup has almost identical peak HP and a little more torque than the original swift 4 cyl. It drives almost identical with regard to acceleration and top speed.
I went with all new DC motor and 'stuff' including lead-acid batteries. Material cost was right at $8k. If you go crazy with AC motor and Lithium batteries you can have a hot autocrosser, but end up spending closer to $20k.
Anyway, if you're curious, I have documented the whole build process at
Homepage - EnviroKarma.org