The No. 2009 biscuits have a 5/8" hole, so it probably wouldn't be impossible to drill them out to 3/4". No idea though whats inside of them if there is any structure that would be compromised by the hole getting bigger. I dug through my album and found a few more pics to put on the shared album below, take a look and see if any of it helps. Have not remembered to crawl under when I was with the truck. Possibly next weekend I can, hoping to replace the manifold gaskets if they arrive in time. Seems as though I can't make a set of those gaskets last, they always seem to rust and get blown out.
Grigg is correct, the height comes into play pretty quickly being between the axles...Not much point in having it if it hangs up on everything you attempt to drive over.
