Some Jerk Boxes / Blocks bookmarks for later reference
Jerk Block Building Tutorial by Greg Everett
48″ x 24″ boxes, ~ $300
40″ x 24″ boxes, ~ $160
Jerk Box Construction by Les Simonton
40″ x 20″ boxes, detailed construction plans
Greg Everett in modifying the Jerk Box Tutorial to built Pulling Blocks
If you just want Pulling Blocks check out the Stair Blocks.
Here Donny Shankle shows how he constructed the top part of a jerk block.
DIY Jerk Box Construction Resources is a post by Gregor Winter from All Things Gym.