it's not really a contest, but rather bench racing turned reality to challenge the staff to buy and build something for under $1500, but after I got mine done the head gasket blew. so I've busted the budget.  I think my current plan is to just fix the gasket and then get it on the trail. I'd rather go wheeling than spend a few weeks waiting for parts.  then down the road I'll do some sort of swap. ÂÂ
here is what I'm considering
1.6
1.8
vw diesel
4.3 v-6
I'm leaning towards the 1.8 since it's zuki, but still different.  any input on that?
Please, Please, Please keep it Suzuki! The 1.6 16-valve and the 1.8/2.0 Swaps will get you the power you want, at least I think so anyways.

All three of these swaps would use the same adapter plate to the transmission, however, the 1.8 and the 2.0 will need custom flywheel work and other modifications to make them work. The 1.6 16-valve swap is becoming quite popular so that means more vendors are supporting/offering it and there is more help amongst the enthusiasts group that has done it.
Having said that the 'being different' part is cool too. Another possible option is the new 2004 Aerio 2.3 liter 4-banger it is a bored and stroked 2.0 (same family as the 1.8 ) that would fit in there as well. That would be cool / cutting edge/ one of a kind...
Good luck, Eric