I measured the boards on my '37 Chevy 1/2 ton.

Two, one on each end, are: 7 3/4" wide
Four are: 7 7/16" wide

Length for all 6 boards is: 86"

Edit adddition--I do not know the thickness for a '37. But, if IF, it is the same as for a '46: it is 13/16".

Last edited by 46Sparky; 04/01/2017 12:21 AM.