the late 50's/60's car shroud is slightly wider than the truck rad and the hole spacing down each side is slightly different, probably that's what you have - if it looks like this .... it works with a bit of fudging, but on a 57 you could move the rad back like the factory did and fab the sheet metal top and bottom

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