You did months of research and still bought an LML? Hope it was cheap!
Congrats on your purchase brother, looks like a very nice ride. I'm really not trying to rain on your parade, I just hope it treats you right so you're happy with it. Unfortunately the LML track record has been a little less than stellar when it comes to emission systems issues and the fuel system.
So I'd recommend doing your research to start treating it right first thing. Things like lift pump, added filtration, fuel additives, etc. That's up to you, I just like to ensure new owners are aware. Once aware of the issues, I feel most Dmax owners elect to do the right thing, even at additional expense, to ensure a happy truck, and owner!
Modify away, worst case, there ain't nothing you can't fix. Entire fuel system is only about $3k now if you put it on yourself.
Emissions system delete fixes all the other although that just became much more complicated. If you're from Indy, I'm sure you can still find someone just up the road from you to do it if you decide that's what you want to do. 2 hours north of you is the hotshot capital of the world. Personally, if I'd had to deal with all the crap on mine, there's no way I'd still own it. It was constant failures, limping, and expensive repairs. All you could depend on was problems.
But to end on a good note, again, super cool truck.