your all right, under your cross sill,s you have a block of wood lets say a 2x4 cut at 4 " long , under the front cross sill, one ahead of the hump in the frame by the axle, and one after the hump, and thats for a 1/2 ton,. 3/4 ton you have 4 of them 2 in front of the hump and 2 behind the hump, is that clear enough ? whew
