If your boat is not already drilled with the right hole pattern for the 4 mounting screws, have someone help you support the motor in the "down" position. That will confirm that the shaft will clear the bow of the boat. Then, put the motor in the "stowed" position to be sure the lower unit clears your trailer and the control head clears any forward-mounted rod holders.

As far as I know, Lowrance owners cannot run the transducer cable down the track in the shaft...but maybe someone has found a way around this dimension problem.