We offer a range of 2-step electric step assemblies for motorhomes like your 1986 Winnebago Chieftain 27 that are displayed on the linked page. These are available in three different widths: 24-inch, 26-1/4-inch and 30-inch. Based on photos of this motorhome that I found and reviewed I think your step size will be 24-inches like # LC372261. The mounting holes for this unit are spaced apart 8 x 22-inches. All step units are rated for 300-lbs.
You will want to take note of the spacing of... view full answer...