The only person that I know on here that's ever had coilovers on a cab is AdamB and he's not on here much these days but he had FK's on his. You may want to ask this in another section like the garage or mk2 as a few on here will have coilovers on different marques.
I guess you need to ask why you want coilovers, is it so you can lower it for a show for example or is it for the performance ? They are supposed to be a really harsh ride and a lot of people recommend a static setup of Eibach springs and koni shocks with say a 40mm drop.