tubbed on leafs

I have a 58 Apache with multi-leafs and shocks mounted to the inside of the frame. Hoosier Pro Streets barely fit in the back (and look great). My problem is the truck will roll violently in the back during acceleration if the suspension is upset by bumps or directional changes. Nothing underneath is new but all appears in good working order. Acceleration off the line produces a wheel hop that is sure to rip the rear axle out. From 60 to 65 mph a vibration in the chassis is excessive and I believe it is the rear tires. There is at least 4 Ounces of weight on the outside of the rear wheels only. My experience has shown this does not produce good dynamic balance. How do I prevent the body roll and what is the best way to balance a 29 x 18.5 tire?

Dude looks cool but do you have traction bars or anything under it? Also could be your pinion angle. Did you change rear ends/ Is your driveshaft to short or long? I have a 55 sedan tubbed w/ 18.5 Mickey's and 15x15 dragstars and it does shake a little at certain speeds but when I'm smoken them it's soft as silk. I'll look and see how they are bal. tomorrow and let you know. I did go to a shop that does my 35's on my truck. Don't know if they have any special equipment. Good luck

Balance is not as important an issue as the body roll. I can't pass a car without worrying about the tail wagging effect during acceleration(it instantly goes away when I get off the gas) I considered an unequaled shock dampning. Is an airshock the more cost efficient way or could an adjustable dampning shock be purchased for the same price as airshocks?

I think you do need to stiffin that up. I swaped my leafs first but didn't drive it much. my friend has a 56 that is done your way and he has air shocks on his. Coil over shocks would do the same without lifting up the car if you have room. I know it might be tight in there so I guess it just depends on how your ride sits. Mine is low and even adjusting the coil over lifts the back a little. I bought my coil overs from Summit and got them pretty cheap and some of there guys really know their shit. Maybe ask them what they think. Should/t be much either way

How much air pressure are you running, are the rims the correct size for the tires?? Air shocks do not promote good handling, try some gas filled shocks. Get your springs re-arched if you are using the air shocks to raise the ride height. Ladder bars and housing floaters will take the wheel hop out of the truck. Are you sure the vibration is tires, or is your driveshaft out of balance or maybe a bad U-Joint???