IIRC, the $400 is done as original, i.e. with cloth insulation and loom.

The $165 version is done with modern materials, i.e. rubber and/or vinyl insulation and loom.

Both should work equally well in your truck.

~#~#~#~#~
1946 Chevrolet 3600 - "Old Number Seven"

Cavalry's Here. Cavalry's a frightened guy with a rock, but it's here.