WOW! I had no idea this was alive, glad it may have helped others, sadly I had to sell my 80 in late 2009 to try & save my dog (8k in vet bills suck, not saving her was worse)
I miss the 80 about as much as the dog. :( but my Magnuson SC Sequoia helps!
I had non folding & missed it, got these.
https://www.ebay.com/itm/234445534443
They are 90% OEM quality & not the astronomical 1200+ of the only other folding tow mirrors I have seen.
There are a number of threads on tundras.com regarding this topic, the last few in this thread show how bad the canned Magnuson tune was.
https://www.tundras.com/threads/viktor-g-tuning.89986/
Good luck!
Your best bet is look here under the generation of your truck.
https://www.tundras.com/forums/
I would think that big of a lift will need diff(s) sway(s) and possible brake hose elongation/relocation. But as I don't know what truck you have it's hard to say.