I doubt you will be able to do a simple "Drop in" replacement. At minimum any larger output alt will require pulley & belt mods to accommodate the higher loads. Other changes may also be required or beneficial after determining what the goal is and how best to satisfy it.Do you know a specific part number ? Would it be "Plug and Play"?
Thank You
Jerry
Only thing I don'[t like about that engine is the single belt, better check that first, as as they wear they slip.
I have 3) 8d AGM house batteries, 1) 8d AGM engine Battery and Bow and Stern thruster AGM batteries that need to be charges will traveling. They are all being charged by the Alternator . Refrigerator, Autopilot and Plotter are on.. within a hour voltage gauges are dropping to 12.7 from 13.4 starting out. Once the hit 12.5 I run the Generator to help out. Have not been running radar trying to save power. Trying to not have to run Generator