Wheel cribs and race ramps suggestions

I'd like to add something but it's probably not that big of a deal for cribbing but... I have years of experience using blocks of wood when doing automobile collision frame repair and those pressure treated pieces of wood with the little claw marks all over them (wolmanized) do not hold up very well. The wood that is selected is soft so it will absorb the preservative and all of those claw marks are incipient cracks waiting to happen.