ok heres a good question for you all, okay on the advance design trucks, there are only 6 bolts that keep it connected to the chassis. of the 6 bolts there are four, (the 2 front and the 2 back)that go through these wooden blocks. when i bought my 50 1/2 ton, the guy before me had all ready removed the bed and in the process, lost of threw away the blocks. now im ready to put my bed back on the chassis, after having blasted and painted it. i was wondering if any one knows the measurements (height, width, and depth) of these four blocks? i really dont want to pay chevy duty $12 just for some peices of wood if i can help it. anyone that might be able to help me out id be very grateful. thanks all murdoc.