I want to try and install with out using fairing block, how do I get the hull angle for what I believe is a tilted elimantNot sure what you are asking.
12 or 20 degree angle of the hull for where you plan to install or beam width the transducer.
I'm guessing angle of your hull.
Go to Home depot or Lowe's and but a cheap angle finder like this
Shop Swanson Tool Company Magnetic Angle Finder at Lowes.com