The mount is original I believe. It has the holes drilled and has a metal strap on each side. The engine can be moved front or back and then tightened down.The thing to watch for is right or left thrust as the mount is a bit bigger than the engine so I will use a meter to get the zero thrust called for. I just did not notice the forward movement I had.This 1/4" I have can affect the balance and will be corrected.Thanks but no new holes will be drilled.