First off, If it's been siting for a while, drain ALL TH FLUIDS. Gas as well.
Do a full tune up. New fuel filter. And it may run all right.
The stock Hitachi carb hates to be left unused so it will more than likely give you problems. Swap in a Toyota Carola 1200 carb. Under $100.
If your going to do a shackle lift, don't go over 2"
Even a 2" lift is going to require new shocks, brake lines, caster wedges, ETC.
Larger tires require lower gears....
There are NO SHORT CUTS TO THIS GAME.
Lots of great advice available on all aspects of Zuke building on this site and other zuke sites.
Take advantage of them.
And don't be in a hurry. Do your research before you Change a thing.
Map out your build on paper first. Set a budget. Save your money. Buy ALL the parts required to build it correctly. Then start your build.
And most of all, have fun, be safe......
PS: if you need detailed advice, feel free to pm me......