Help!!Diesel Swap 91G3500RallyVan
 

I have a 1991 GMC G3500 rally van 15 Passenger van 350TBI drinking smoking lots of oil … I want to
use it to travel with 15 passengers for basketball team... Second I want to use it to tow 15000 LBS -17000 lbs boat trailer etc… I plan on putting a duramax /Cummings diesel engine in it and putting DRW “Dually” axle on it to increase safety while with passengers…
If I do this plus had someone put the 4x4 system in it... Will I be able to tow 15k-17k pounds of tailoring...Lastly but most importantly will I be able to carry 15 passengers safely without worry about flipping over? Estimations please? ---Information is it possible to put a duramax or Cummings in