My Engine Mount is shorter in every direction compared to the predrilled holes in the firewall. Vertical left = -1/8", Vertical right = -1/16", Horizontal top = -3/32", Horizontal bottom = -1/32". If I put 1/4" bolts thru 3 holes I have to hang a 30 pound weight on the open hole in order to catch metal to drill for a circular hole. Van's says to pull it into position and to drill the holes--if you oblong a coulple of holes, don't worry about it! I asked what the criteria (+-) was for the firewall holes and the mount holes. He said there was no criteria? What's up with that? He said every week someone calls complaining about the same thing. Wouldn't you think they would initiate some action--like don't drill the holes in the first place! Or tighten up the specifications at the weld shop for the engine mount. Has anyone had mismatched holes that have been to bad to drill? Input would be appreciated so I can formulate how to proceed.