Well.....weight distribution (or polar moment inertia), suspension, and tires are a big factor in what you just asked. Our trucks were designed to haul payloads and trailers. Suspension was designed more to go straight than corner. With a large percentage of weight in the front of the truck, the rear live axle (hotchkiss drive) offers very little in the way of ride comfort or suspension perfomance. A sedan has better wieght distribution and lower center of gravity which equals better handling. Suspension geometry is a big subject. Tires, in the opinion of many, are the most important part of the driving experience. Tire height, tread, and ratings, can determine how you tune your suspension. Granted, in a stock B-1-B, there are not a lot of tuning options, but understanding the characteristic of the design you might find a set-up you can live with. What I mean by that is, you're not planning on loading your truck down 99% of the time, keep that in mind when your choosing tires, shocks and leaf springs.
Here's a decent suspension 101 link. http://rqriley.com/suspensn.htm
http://www.popularhotrodding.com/tech/0604_rear_suspension_guide/index.html
My experience in suspension design/geometry comes from stock car racing, not building trucks. But, my 50' will get the best from what a guy going in circles has to offer. lol.
48D