Ive been in the process of looking for a a donor vehicle to use to convert my 1991 e350 shuttle bus to 4x4. The only axles I see is the dana 44 in the older conversions. The fabricator told me he thinks it will be ok.. not very confident. I really would like to find a already converted van with the dana 60. Do the exist? Or is the 44 strong enough. Thia vehicle is going to be used to tow a small trailer and no real extreme offroading.