With my bracket set up for 30 inch shaft I used the 12x12 with 11 inch clearance. My brother in law has a 20 seacraft with a Armstrong set for 25 inch shaft and he also used the 12x12 lenco s with 11 inch clearance and they just made it with out trim. If it were me I would mark your bracket on transom along with tab locations and adjust as needed. Lenco ask for 3/8 off bottom u could use a little of that if u need it to make it. Hope this helps
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