I've got 4 tubes of sand, about 60# each that I throw in the back of the 2 wheel drive, and a set of studs. We don't get as much snow here in the OR valley as you do, though.
The 4x4 is a pretty rugged little truck, and if you are after more power, read over some of the threads on bolt on 4 cylinder upgrades.
TumwaterTaz has a pretty straightforward formula for the 1.8, plus he's running an Impulse engine and 5 speed in his truck. Taz is a great source of mix and match cross reference info from Isuzu to Luv. Watch for posts from 800xl, and rodeobob also, just a couple of the members who provide great technical information. If you need a part and can't find it, watch for posts from
ctmandu, he is the 'Indiana Jones' of unobtainium Luv parts. Plus, Mokadeth just ordered up several brand new
Offy intakes, contact him for availability.
If you didn't know already, there are some drivetrain and engine parts from newer (80's) Isuzu Troopers/Rodeos/P'ups that will pretty much drop right in to the Luv. Parts are still pretty plentiful here in the NW and generally inexpensive.
Btw, welcome to the site. Looking forward to seeing some photos of your truck
