When I was making Hooptys mounts, I had to draw out the mounts with correct angles and to scale, when I wanted to shift to one side.. I made a prototype set of mounts from cardboard, while the motor was sitting where I wanted. The Hemi block is 45 degrees (close enough) and then I got the angle off the mounts and width of my perches and worked from there. It can be a little tricky to shift to one side and not cause a lean or change height. Put some osb between the pan and k, and just let it set little there and shift it around a little. You got this.. this is nothing man. Or.. a deadblow