If you're trying to duplicate a Velocity Bronco, check out their builds for a list of upgrades.
But to me, a top of the line build would have a Kincer frame, Bronco Design fiberglass body or new repro steel body, Coyote/10R80/Atlas/Currie drive train, ARB lockers front and rear, Duff or Wild Horses suspension (lift size to suit you - 2 1/2? 3 1/2? Plus 1 inch BL?), Wilwood 4-wheel brakes with hydroboost, hardtop or BC Broncos soft top, 17 inch wheels with tire size of your choice (33 or 35?), Painless harness with all LED lighting, Vintage Air AC system, Ididit tilt column, ported steering box with hydro assist from West Texas Offroad, Fox bypass shocks, full custom leather upholstery with seat heaters and full 6 or 8 point family cage. But that's just my dream! LOL