the "procedure" would be to drill some holes in the roof in the correct location and wire some lights to the light switch .... but clearance lights are not required by law or appropriate on a 1/2T, they're "clearance and identification lights" warning of a wide vehicle

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics