The Cape Dory Board

I selected the 4 cylinder yanmar 50 hp with matching km35p transmission as it was an almost identical match to the old perkins 4108. engine arrived in georgetown bahams about a week and a half ago. Dont see any major corosion issues on the existing bed but am concerned about fabrication of the stern...

i own a 1980 cd36 which recently blew the main seal on the transmission side of the engine block on the original perkins 4108 and have decided to repower it and am considering replacing it with a yanmar 4jh5e with km35p transmission. does anyone have any experience with a repowering? any tips, point...