2wds sit an inch lower than 4wds, so a 3" puck lift for you is more like a 2" spring lift for 4wds. but if you get 3" lift springs, your truck will be 4" higher than it is now. roughly.
31s on stock rims will need WJ lower control arms to prevent rubbing at full lock on the arms.
31s on aftermarket rims will need a 3" lift to prevent rubbing on the flares.
if it were me, I'd go with a 2" puck lift to bump up the front and some 30" tires for the "Jeep look". below is my 2wd 88 with 30 inchers but no lift. 30s clear the arms just fine.