[Dieselwrencher]

You can more than likely ditch the carrier bearing cross member and relocate it how you want and where you need it once you get the rear axle and power train set in the chassis. As for the frame kick up being too high, you could do some figuring and this might be an idea. Right where it kicks up starting before the last cab mount, and before the spring mount, try to find how much kick up you need. Cut the frame at maybe a 45* cut somewhere in that area. Remove some material needed to get the kick up you desire. Cut the other at 45*, bevel each side, weld up, then plate the inside and either bolt this in or weld it in. Then place your rear axle and figure out where you can add your 4" of frame to achieve your desired wheel base. Good luck with this portion of the project. It is coming along nicely!