I had a 1988 F350 4x4 with the 7.3, which came out late 1987 to replace the chamber dropping deck beating 6.9 diesel. I had one of those too, a 1986, piece of crap. That being said that 1988 with the NA 7.3 was one of the best trucks I ever owned. And yes, you can get the E series in 4x4, the oilfield service companies, power companies, and seismic companies order them by the dozens. The power companies have them up for auction all the time, and these E350 & E450 are usually low mileage, well maintained because they are under factory maintenance programs, and most are 4x4 with either the V10 ir 6.7 diesel. If anyone is interested, let me know and I'll let you know when the next auction is. They have pickups and trucks too.