Porpoising

I tried moving all the weight I could forward of the wheels including put 100 pounds of lead in the forward part of the basement and didn’t help the chucking. Tried to leave water in my tanks forward of the wheels and that didn’t help. Last Friday I had Mor/Ryde pin box installed I took about 40-mile trip and the chuck seems to be reduced to almost nothing. Next week we are talking a 1000 mile round trip to Estes Park so not only I will experience the new pin box but also I will get to experience this new diesel truck I just purchased in the Rookies. Thanks for all the suggestions and hopefully my chucking problem is solved.