Sikid,

This is just my .02c but from what I've read above I think your opening a huge can of worms here and it's one of those projects that will cost a hell of alot more than expected and take a while to complete.

If I had the 8v motor I would be sticking to the Carb as it sounds like you wheel in alot of mud/water during the wet season and from my experience with the EFI motor it's hard to keep it dry and running.

Nothing will pi$$ you off more than a day out wheeling with your mates and developing a miss after playing in water and not being able to find which one of the plugs/wires/sensors etc is playing up. I reckon carbs have to be the go for this type of application as it's not as if your on hell angles needing EFI or trying to do the quarter mile in sub 10's.

I run a re-jetted Mikuni carb (same as yours) on a SJ413 and it performs great, many a time she's been submerged and its keep on going on with no electrical problems    

I'd be looking at getting the most out of the 8v like headers/exhaust/filter then a gearing correction for ya 32's weather it be R&P's or rock hoppers then for the mud, lockers !! A supercharger is not good for sh!t if ya can get the power to the ground   but that's only my .02c anyways  





Can't beat that simple carb system for that  
Shane