I wasn't meaning to sound negative about Your work Tootall , I hope with all those new seals and Gaskets and things being tightened up correctly that there wouldn't be a chance for any leaks to be Honest ...its just that everyone says that MV's just seep or ooze or drip no matter what you do , that the only difference is they do those things faster when both the Vehicle and the air temps are high...... unless the things that are meant the have oil or fluids in them are empty .
As for the handling I'd think that it will be much more stable and not as apt to wonder as it's traveling at speed , the rear bogie's should be much more flexable and hug the terrain better as well .