What’s your budget? What do you consider off road? What do you mean by leveling kit?
The more detail you can provide the better the community can help. For instance you can spend under $200 for OEM shocks or $$$$ for after market.
These trucks require a slight rake and don’t handle too well leveled. Not sure I’d go less than 3/4” back to front rake with 60mm droop. But search for exact numbers to be safe.