The GVW at back of the MH is almost over loaded but the front is not with some left over. Does mounting the spair tire and wheel on the front in front of the radiator block the air flow to the radiator?
Other notes, 1992 Winnebago Winnie, found tight engine valves, runs better now.
Built a track bar/pannard rod, bar from frame to axel at the rear. Keeps the coach from swaying side for side in wind. ie body over the axel. Not a antisway bar, that trys to stop the "lean" of the coach. Track bar does help steering control also. Used 2 140 Volvo track bar, cut in half and used the small ends. Used one additional toyota spring clamp "u" bolt and hooks under stock "U". Mounts on axel drivers side and frame pass. side. Sandwitch mounting plates around frame on pass side. Hard to clear brake stuff on pass side. 6k trip works great.
Built reciver for Bike rack, build channel to fit inside of frame horns/ends at sq. tube "hose holder." Weld plates on end of channels to bolt to the flange,( vertical section of the frame) of the MH frame ends at hose holder.The channel takes the weight. Angle iron runs front beside the holding tank(it is off to the pass side a bit) to the front, to a angle iron installed rignt left accross the frame. 12000 miles, it works good, it bike wheel, does block the pass side tail light some what. Need to install additonal tail/stop light. Holds ONLY two bikes.
To remove the roof A/C will motel it when hot at night. Have not used roof A/C to in three labor/memorial trips to CA, from ND. We have not had to motel it, we just head for a lake or the mountains for the nights camping when it is hot.
TR 145 http://www.volvoadventures.com/220spec.html