Those are a few shots of our truck. The truck is within 40lbs front to rear when it was weighed. This helps...... a lot of it has to do with how your suspension is set up, the kind of jump you are jumping, and what you do with the throttle when you go off a jump.
If your suspension transfers a lot of weight to the rear and the rear packs up on the take off you will get that affect of the rear of the truck going over your head.
If the jump has a smooth take off with a long run up to it, you will usually fly better than if the jump is a bit of a kicker.
Then......there is throttle control. Sometimes you will here someone take their foot off the gas just before going off the jump and then right back on as they go off. I will do that on certain jumps, especially the kickers to try and transfer the weight of the truck to the rear so the front is light when it hits the jump to fly level.
So, as for jumping a vehicle there is a lot more to flying level than just where to put the weight on the vehicle.