1950 shortbed. 9 board bed. anyone got some advice?

im looking for a link to a website that offers the dimensions of the grooves that need to be cut for the metal strips. also, i cant find yellow pine in my area, anyone use normal white pine instead? does it hold up pretty well?

im also curious about the dimensions of the wooden blocks that go between the bed and the frame. anyone feel free too chime in at any time, any adivce would be appreciated