Body lifts come in .5", 1", 1.5" 2", 2.5", and 3" (or anything in-between if you make it custom). Most of us (myself included) think BLs are best used in addition to a suspension lift primarily to clear bigger tires easier. Although you can do a BL alone, you only get clearance for bigger tires - unlike a suspension lift which still gives you more clearance for tires, but you also get more ground clearance for the chassis and more travel/articulation in the suspension too. I run a 3" OME suspension lift along with a 1" BL to clear my 33.5"+ tires. W/O the BL, my tires would rub.
If you are doing it strictly for looks, leave now.
Really, though a BL is THE CHEAPEST WAY TO LIFT. So if you are a mall queen, this might be best for you.
1-1.5" BLs on '97-02s don't require anything special except removing the lower radiator shroud (which takes seconds). If you have a stock bumper, you'll want to get a bumper bracket lift so you won't have a gap between the body and the bumper (since the body goes up but the bumper is connected to the frame which stays put). '96s have 2 less body mounts than the other 3rd gens so those must be added to do a BL (safely at least) as well as a steering rag joint extension. All of these extras can be purchased from:
Toyota 4Runner/Hilux Surf Body Lift Kit Pricing/Ordering Page
If you're doing a more than a 1" BL, there are modifications you need to make like dropping the radiator and extending shifter linkage. For more info:
3rd Gen 4Runner Body Lift Installation
Installing a BL (especially a 1" on a '97-02) is pretty easy even if you have limited mechanical knowledge. If you're the DIY type (which you better learn to be fast in this hobby), refer to the link directly above for important info.
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2021 Tacoma 4x4 TRD Off Road Double Cab Short Bed (my DD)
2017 4Runner 4x4 Limited (the wife’s)