The 2.5Lv6 can be squeezed into first gen kicker/trackers. If you are planning on keeping IFS it is much tighter, and will require several fittings and a slight modification of the oil pan.
Changing out the complete wiring is possibly the easiest way. Modifying wiring harnesses takes a lot of time to get it right (especially the first time). I would really recommend at least buying the FSM for the model/year of your donor vehicle.
This will take some time. Find your manual wiring harness.
What year is the motor out of?
This is a very long thread, but it may give you an idea of where you are going. http://www.zukiworld.com/forum/index.php?topic=22395.0
I want to pull this off on my 1995 after reading online i think im going to sway away from the tdi swap and lean more towards a Suzuki engine swap. The h25a is a stout engine and its easier to find vs a h27a so im going to be on the lookout for a grand vitara or a Chevy tracker zr2. The complete drive train swap and wire harness seems to be the best bet.
Just wondering if i should use the odometer from the vitara ir try to wire up the tracker unit.
This fourm is full of alot of information and great people