If I installed 2 more leafs on each side how much height would it give appox?

 

you can put some different shackles on the rear leafs instead. it would give you the extra height, and it wont stiffen up your ride.

 

depends on how much you want to go up . they make 1-6 inch add-a -leafs

 

If I added shackels would it make a diff when I was towing a travel trailer...Cause I want about 2 inches in the back and the level the front off and put bigger tires on..if i can...I would like to put on 20" rims though