Basher
 In all fairness  to the Suzuki  folks and  the “  things not being Suzuki,â€? issue  isn’t just  something to do with Suzuki owners .
 Back  when I was in high school , I built a Model T . I dropped a Chevy engine in it. I did that for no given reason other then  I had a 327 sitting in the shop on our farm  .
 You should have heard the complaints about  me putting a chevy in a ford LMAO .
My scout was the same deal  a lot of IH folks simply would not comment or even help  because I wasn’t staying fully IH ..
  don’t let this type of thing  get you down . IMO  take what those folks know  and use it . No mater if you  do an un like swap or a swap  within someone’s set boundaries. In the end you own the rig . Its yours to do with as you like .

As to weight issues. I believe the 4 door sidekicks weigh in    at well over 200lbs more then the two door . Yet do they not run the same 1.6 ,8 and 16V .?
 The only difference I could see is a possible  compression of your front end  from the added 200 or so lbs as the weight isn’t distributed  .  this could be corrected however easily enough .
 If your are  jumping  your rig though this could make a big difference. But I don’t know to many who jump  while on the street . In fact at my age I don’t know   any who jump LOL  .
As to going through parts . This can be an issue . But a lot of times IMO that issue is really about driving habits or the applications of tier sizes well beyond  the capability / design of the axels/ diff’s  or trany  themselves . My knowledge of how well the Suzuki trany’s and  running gear are made  or what they are capable of withstanding is limited to say the least . Im sure others here would know  if those components are capable of withstanding the  increases from the 4.3 .
But ,,,,, with any swap  this can be  a problem  be it swapping out the engine or simple  putting on bigger tiers .

 I would also have to support what another said here about   what the small 4 cylinders of today are capable of . I know  the kids today seem to be getting a whole lot out of their engines . .
I guess for me , im stuck in the ages  with our dated knowledge of  the big displacement engines  found in Dusters, GTO’s , Road Runners and the like . Muscle cars were what we wanted  and that’s what we built our standers to . i can tell you there is nothing like  the feeling of a 67 GTO Judge gettin  bent . the rear end  digging low as she  leans into the  throuttle  and your thrown back into the seat . holding tight for all you have to the wheel  as the front end lifts and twists . that was power  and  guys could  tell if you had it or not just by the sound of your engine at idle .
 whoooooooo  still gives me goose bumps .
 anyway sorry , im way off track here .
 Myself  my zuk  is going to stay somewhat stock . I bought it for  everyday driving .
 I already have a  off road rig that suits me .
 My point I guess is again , have fun with it  , its your rig .
 Just have the minds eye to do what ever you decide to do , safely 

haha, i really need to get some pics up, not that my rig is so bad ass or anything, just the street driving thing made me smile, i dont think ive had it out of low range in 5 years, its all dents and glory,twisted steel and sex apeal, as far as springs im in the middle of a yj swap and frame stretch, i dont do much jumping anymore myself, at 35 my body doesnt like the landings, and i hear you on the muscle cars i have a old vette i like to abuse from time to time, theres no such thing as to much power, just how much you can afford to run