bed slides on a sunwagon wind up

[wayneb]

Hi all

new to the site and there is a lot of info and ideas on here, im doing a rebuild on a 1984 Sunwagon, I want to change the way the bed slide works
The beds slide in and drop onto alloy angle when you set up, you have to lift and slide beds out nearly a two person job, I want to replace them with runners, slides. wondering if any one can assist with info on this and what mods have to made to the roof if any, thanks Wayne   
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