The thing to keep in mind is that the amount of rake will vary depending on several factors:
Amount of fuel in the tank
Number of passengers, esp. in the back
Cargo loaded in the back.
The more weight that is put in the back, the less rake you will have. The more weight you add to the front, the more rake you will have.
You can "adjust" the rake by installing different springs or spacers on the springs.
"Level" is highly over-rated. If you "level" your rig and then add more fuel and let a couple of people climb in the back, your rig is now squatting to the rear pointing the head lights at the sky. Rear heavy is not good for handling or braking, esp. off-road going up hill.
What will be your frame of reference for "level"? No passengers, three passengers, full tank, half tank, 1/4 tank?
Keep in mind that free advice can frequently be worth less than you pay for it.