When you have the hood up on the 4x4, push down hard on one corner while snugging the bolts on the hinge. Do the same to the opposite corner. Remove the 4x4 then slowly push down on the front of your hood. You'll see the rear lip tighten and almost bind with the cowl. The cowl windlace has to be in there! The tighter you can get that rear lip, the better. Some of these hoods really need good push down to tighten them up. Sometimes, gentle isn't the way. And don't forget, if you can move the hinges as far down or back as you need, you can elongate the hinge mount holes to remedy that. On mine, everything worked fine except that the drivers side hinge needed to go back towards the rear of the vehicle about 3/8". So I removed the hinge and lengthened the three holes. Reattached, resealed, readjusted and no gaps and a flat hood.
