I really like that look
The Ramcharger would be fine with that too, but it is particularly nice on the truck because with the stock gas tank location on the pickups it fills the area between the drive shaft and the left frame rail and you have to run additional tubing to make the exhaust look symmetrical. The Ramcharger gas tank is mounted behind the rear end between the frame rails, so you can end your exhaust on both sides behind the tires and in front of the fuel tank or go under the frame rail and exit at the bumper.
As a matter of fact, I like it so much I think I will do the same to my '87 for all the above reasons. The NAPA store in Redmond caters to the "Big Rig" crowd and while their stuff is mounted vertically, it won't know the difference if I mount mine horizontally
What was old is now new again