telephone truck bed

[CSHADES]

So i was just minding my own business a couple of weeks ago checking out the ads on fb marketplace and i came across something i always wanted. it is a telephone service bed for a 50 chevy truck. i always thought they were cool but not very available. this one was about 2 hours away in one of those towns that you cant get there from here. i am thinking about putting it on my purple 40 truck, my only concern is what the thing weighs. i havent come up with a good way to have it weighed without making a bunch of trips back and forth to town. but what is the worst that can happen? i may have to increase the springs in the back. it is 6ft long, 54 in wide and 35 in tall from the frame to the top