does anyone have the measurements on the bed of a 87??? I am in the office and dont have the truck with me. I found one that the owner know nothing about. its about 55" across the bed. and about 52" back, but the rear is elevated about 4" does this sound right

 

Too bad the seller doesn't know what type of vehicle it came out of. If it's raised in the rear then it would mount on the wheel wells. Here are exterior specs I got off of Edmunds:

Exterior
Length: 193.1 in. Width: 66.5 in.
Height: 67.3 in. Wheel Base: 121.9 in.
Ground Clearance: 8.7 in. Curb Weight: 3460 lbs.
Gross Weight: 5350 lbs.

Unless someone knows off-hand, you'll probably have to measure your bed.