Go for it. I did a conversion on a 1990 suttlebus. it has a 5.9 cumm. 4sp allison with trans retarda.Itook all seats out,all interior stuff and then I measured and measured and measured some more, then I sat and drew out plans and measured some more to see if everything would fit then I took out all of the windows and boxed in frams for camper windows. Marked out all interior wall area on floor with maskintape .And then measured some moore. When everything fit I started building useing 2x2 lumber and 1/2"fibreboard.It has a rear bed with closet,bathroom with shower,kitchen and living area. If you have and older motorhome you can salvage you have all the stuff you will need. Water tanks, refrigerator, stove, seats, tabels, generator. Save all of the wireing you take out,you will save alot of money buy useing it.Cabinets ,draws , plumbing sinks,lites, windows.I used frp (fiber renforsed plastic) for the out side sideing.Go to bus conversions for more info. I wish you luck. PS I realy enjoyed doing mine. Russ.