measure it all up carefully, you'd likely need to keep the panel roof to the top of the A pillars, where there may be a leaded factory joint - on the later panels the crown of the roof at the front is different than the pickup's shorter roof
"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