 After closely roughing the...  After closely roughing the hole out with the saw, I filed all the edges even and smooth. The slotted holes didn't need to be really oversized, but just enough to avoid a tight fit. |  The bottom hole on the same...  The bottom hole on the same frame horn needed about the same amount of additional clearance. This was done just like the top hole. |  And there we have it! The...  And there we have it! The front is looking like a real truck after being bumper-less since the initial tear down before the build. |