Well, the first "sleeper I had was across the seats in a D1000 Ford, not too bad as it happens, because the seat on the passenger side was a bench, and at the same hight, also, there wernt an engine hump! Curtains were bits of old curtain and jackets ect stuffed into any available gap round the cab toi hold them up! Night heaters, not a prayer!
I got an artic after that, and it was a “sleeper” according to the gaffer anyway. It was a Mk11 borderer with a 150 Gardner in it on bulk tipping. The sleeper was 2 aluminium poles attatched to a canvas bunk. The lot was fastened to the back of the cab on the timber frame, and it lifted forwards on to two lugs attached to the front timber frame. There wernt a lot of room, and being only 13 stone at the time I could get in it, but had to lie like dracula! The night heater was a 9lb propane bottle and a council hut heater 
you couldnt use it overnight or youd die! The day heater was marked as absent, even up telegraph loaded top whack it never worked! Curtains were as above.
ERF B series day cab, I made me own sleeper, it was an interiour door cut in half, and 2 legs fixed on it. that went over the passenger seat and made a handy place for me tools and dogs&chains and some rope ect. On top of that I got a caravan seat mattress, this was rolled with a couple of blankets over to the passenger side, and tied with a string. To enter bed, you pulled the string, the mattress sprung open, and hit you where you were sat in the drivers seat! 
Then you wriggled from under that lot and crawled in! Curtains were hung from 4 six inch nails in the 4 corners of the cab. Night heater was booze, and the day heater sometimes worked, but you couldnt bank on it!
Then I got a B series with a Jennings! 
I dont need to tell anybody that was in rough kips like the above what a great tool that was, it had fitted curtains on a rail! We’re still on a booze powered night heater, but I could at least sleep without me clothes on! Yepp those Jennings were the dogs to me at the time, what crap they were compared against the modern stuff!
Im not gonna ramble on about sleeping in buffalo’s Atki’s and stuff with a big engine hump and no bed, it’s too much typing! 
Oh, any of you lads remmebr in aec ergo’s and Buff’s the engine hump sloped forwards and tipped you into the screen!
Now then, some of the old gents will kindly tell us kids about coach built cabs and REAL hardship!
here’s one I made earlier ,although it’s nothing really compared with coach building a timber frame ect .
