That looks really good, my Dad and I were just talking about the timing cover modification this morning. I don't have time to rework much stuff before Drag Week so I ordered a Delta Pag 18" 4000CFM fan. Its only 2.1" thick at the edge and 2.7" in the middle. Not the cheapest option but I have wanted one for awhile because I can control its speed with my Megasquirt.