what engine, not stock? a shroud helps if the engine fan is set back from the rad too far, which will be the case with a non-stock V8 in an original 6 cylinder truck, if the fan is more than 1/2-3/4" away from the rad, get a shroud .... and ditch the electric fan

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