2020 Silverado 1500 Z71 standard bed, simple 1.5" motofab lower strut spacers, and Toyo Open Country M/T 275/70r18 (33.2x10.8) on 18" method NV -11 offset, no rubbing issues, almost level (only 1/8 lower in front [measuring ground to fender well]).
Note, if you buy any of Motofab's lower strut spacer level kits, and have a 2019+ aluminum lower control arm, the supplied bolts are too short. Motofab said they are working on it and offered me longer bolts, but I was in a hurry, turned them down, they offered me a t-shirt, turned them down lol, just bought some bolts at home depot. You'll need 3.5" bolts for the 1.5" level kit (technically, 3.5" long, 3/8" dia., grade 8 or better, sz 16 nut). Only the toe angle was out of alignment afterwards, which I had aligned. Would've got wider tires + less knobby, but got wheels + tires for a huge bargain from some rich dude who only used them for 1500 miles. Anyhow, dig it! Cybertruck who? Any higher it'll be hard to put dirt bikes in the back!