mmm depends if youwant to add the area of the newreeds???.. opening a hair bigger into block,,, and still on the side,,, as i figg omc engineers werent to far off,,, and many other outboard manufact, copied the 3holer from omc.... it a straight in shot,,, it actually not much bigger than orig for area,,,,, this all done by hand in my apt,,, with grinders and cut off tool... so much for my damage deposit ,,,hehehe
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