It is much the same. What can't be made out in the picture is that the bottom is a triple (the middle one is the ratchet). So the idea is the same, it is just that your ratchet block is in a slightly different place. I have altered your drawing (my skills are worse than yours)to give you an idea. The color changes are just to help keep track of crossing lines. The green bit ends up tied to the becket on the rear/upper block. You may have to try a couple different ways to minimize the sheet crossing itself and rubbing. This is high friction. If the block with the becket is in the front you may have a better option.
Does the double block on top of the ratchet swivel independantly? In the higher purchase sytems, the top set is oriented 90 degrees out from the lower set. Do the top blocks swivel? If so you could run the lines slightly differently. Or use a twist shackle. Look at this websites online store for examples of how the 8:1's are reeved.

I tried to edit your image. I don't know why your blocks have disappeared.