that's been discussed Mike, one thing to keep in mind is that the firewalls on these trucks weren't designed for the stresses that'd result, so will need careful re-enforcing
"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