Motor Mount
First, we also have first-hand knowledge that the standard plastic rectangle that wants to grip a flat 90 degree cross in the stern rail doesn't work; there are no flat 90 degree stern rail crosses on our 340, and I suspect on your 320.We bought two pieces of 1-inch by 8-inch hardwood about 18 inches long, routed both with half-pipes for the upper and lower horizontal stern rails, drilled and bolted for gripping both horizontal stern rails (note: no crosses!). Placed on the Port side between the transom walk-through and the stern rail seats. Oiled and sealed. Works great, looks great! A bit of work, but well worth it. Commercial alternatives either don't fit or are ridiculously expensive. Wish we had pictures to post.Carl and Jules/v 'Syzygy'