running board length

[slatgrille]

Hello all,
I'm fairly new and have posted in the 'want' section for various body metal. I've seen used running boards advertised by several people, but the lengths vary. My project is a '29 roadster pick up. It seems board lengths of 44", 44 3/4", and ~39" are available....so, what is the correct length for a '29?

It seems I also need the splash aprons with the hump on the ends if I'm researching correctly.

Thanks for any help.

Craig